Intracranial Arteriovenous Malformations
Arteriovenous Malformations
Polyvinyls
Embolization, Therapeutic
Cerebral Angiography
Angiography, Digital Subtraction
Magnetic Resonance Angiography
Telangiectasia, Hereditary Hemorrhagic
Enbucrilate
Bucrylate
Radiosurgery
Arteriovenous Fistula
Intracranial Hemorrhages
Vascular Malformations
Cerebral Hemorrhage
Arnold-Chiari Malformation
Pulmonary Veins
Dura Mater
Tomography, X-Ray Computed
Sleep Deprivation
Seizures
Tablets
Electroencephalography
Epilepsy, Absence
Pamphlets
Intracranial arteriovenous malformations. Observations after experience with computerised tomography. (1/621)
Thirty-six patients with angiographically confirmed intracranial arteriovenous malformations have had computerised tomographic scans performed as part of their investigation. This study demonstrates the incidence of haematoma formation after haemorrhage, the frequency of calcification not visible on plain radiographs, and describes the possible causes for a complicating hydrocephalus. Further information has been gained from the intravenous injection of sodium iothalamate (Conray 420), with comparison of the scans taken before and after the injection. (+info)3D angiography. Clinical interest. First applications in interventional neuroradiology. (2/621)
3D angiography is a true technical revolution that allows improvement in the quality and safety of diagnostic and endovascular treatment procedures. 3D angiography images are obtained by reconstruction of a rotational angiography acquisition done on a C-arm (GE Medical Systems) spinning at 40 degrees per second. The carotid or vertebral selective injection of a total of 15 ml of non-ionic contrast media at 3 ml/sec over 5 seconds allows the selection of the "arterial phase". Four hundred sixty 3D angiographic studies were performed from December 1996 to September 1998 on 260 patients and have been analyzed in MIP (Maximum Intensity Projection) and SSD (Shaded Surface Display) views. The exploration of intracranial aneurysms is simplified and only requires, for each vascular axis, a biplane PA and Lateral run followed by a single rotational angiography run. The 3D angiography image is available on the workstation's screen (Advantage Workstation 3.1, GE Medical Systems) in less than 10 minutes after the acquisition of the rotational run. It therefore allows one to analyze, during the intervention, the aneurysm's angioarchitecture, in particular the neck, and select the best therapeutic technique. When endovascular treatment is the best indication, 3D angiography allows one to define the optimal angle of view and accurately select the microcoils dimensions. 3D angiography replaces the multiple oblique views that used to be required to analyze the complex aneurysms and therefore allows a reduction of the total contrast medium quantity, the patient X-ray dose and the length of the intervention time which is a safety factor. Also, in particular for complex cases, it brings additional elements complementing the results of standard 2D DSA and rotational angiograms. In the cervical vascular pathology, 3D angiography allows for a better assessment of the stenosis level and of dissection lesions. Our current research activities focus on the matching without stereotactic frame between 3D X-ray angiography and volumetric MR acquisition, which should allow us to improve the treatment of intracerebral arterio-venous malformations (AVMs). (+info)Popliteal artery occlusion as a late complication of liquid acrylate embolization for cerebral vascular malformation. (3/621)
Occlusion of arteriovenous malformations of the brain (BAVMs) by means of an endovascular approach with liquid acrylate glue is an established treatment modality. The specific hazards of this procedure are related to the central nervous system. In the case of unexpectedly rapid polymerization of the cyanoacrylate glue and adhesion of the delivering microcatheter to the BAVM, severing the catheter at the site of vascular access is considered an acceptable and safe management. We present a unique complication related to this technique that has not been described yet. Fragmentation and migration of the microcatheter, originally left in place, had caused popliteal artery occlusion, which required saphenous vein interposition, in a 25-year-old man. Suggestions for avoiding this complication are discussed. (+info)In vitro models of intracranial arteriovenous fistulas for the evaluation of new endovascular treatment materials. (4/621)
BACKGROUND AND PURPOSE: The purpose of this study was to create and test an in vitro model of intracranial arteriovenous fistulas (AVFs) that simulates the geometry of human vasculature and allows realistic testing of devices used in endovascular therapy. METHODS: The models were derived from corrosion casts of the main cervicocranial arteries and veins obtained from two nonfixed human specimens. Wax copies of the casts were produced and combined to create complex models simulating various types of intracranial AVFs. Wax assemblies were embedded with liquid silicone solidified into transparent blocks containing, after wax evacuation, hollow reproductions of the original vascular trees. The models were connected to a pulsatile pump and their compatibility with various imaging techniques and endovascular treatment materials was evaluated. RESULTS: The models were compatible with digital subtraction angiography, CT, MR imaging, and transcranial Doppler sonography. They provided a realistic endovascular environment for the simulation of interventional neuroradiologic procedures. CONCLUSION: Anatomically accurate and reproducible in vitro models of intracranial AVFs provide a valuable method for evaluating new endovascular treatment materials and for teaching purposes. (+info)Radiation dose to patients and personnel during intraoperative digital subtraction angiography. (5/621)
BACKGROUND AND PURPOSE: The use of intraoperative angiography to assess the results of neurovascular surgery is increasing. The purpose of this study was to measure the radiation dose to patients and personnel during intraoperative angiography and to determine the effect of experience. METHODS: Fifty consecutive intraoperative angiographic studies were performed during aneurysmal clipping or arteriovenous malformation resection from June 1993 to December 1993 and another 50 from December 1994 to June 1995. Data collected prospectively included fluoroscopy time, digital angiography time, number of views, and amount of time the radiologist spent in the room. Student's t-test was used to assess statistical significance. Effective doses were calculated from radiation exposure measurements using adult thoracic and head phantoms. RESULTS: The overall median examination required 5.2 minutes of fluoroscopy, 55 minutes of operating room use, 40 seconds of digital angiographic series time, and four views and runs. The mean room time and the number of views and runs increased in the second group of patients. A trend toward reduced fluoroscopy time was noted. Calculated effective doses for median values were as follows: patient, 76.7 millirems (mrems); radiologist, 0.028 mrems; radiology technologist, 0.044 mrems; and anesthesiologist, 0.016 mrems. CONCLUSION: Intraoperative angiography is performed with a reasonable radiation dose to the patient and personnel. The number of angiographic views and the radiologist's time in the room increase with experience. (+info)Helical CT angiography: dynamic cerebrovascular imaging in children. (6/621)
BACKGROUND AND PURPOSE: The purpose of this study was to assess the feasibility of helical CT cerebrovascular imaging (CTCVI) in children and to make initial comparisons with MR angiography and digital subtraction angiography (DSA). METHODS: Twenty-six patients, ages 3 days to 17 years, were examined with CTCVI. Patients were scanned with 1-mm collimation and 2:1 pitch 30 seconds after the initiation of a hand injection of 2 mL/kg nonionic contrast material (320 mg/dL iodine) with a maximum dose that did not exceed 80 mL (minimum volume, 5 mL in a 2.5-kg infant). Reconstructions were done using maximum intensity projection and integral rendering algorithms. Four patients had CTCVI, MR angiography, and DSA (42 vessels studied) and nine patients had CTCVI and DSA (136 vessels studied). Scores of 1 (not present) to 3 (present in continuity to the first bifurcation) were assigned independently by two radiologists to 32 vessels in each correlated case for each available technique. RESULTS: There were no technical failures. CTCVI depicted 18 thrombosed dural sinuses, three vascular malformations, one intracranial aneurysm, and four tumors. Ninety-five percent of the vessels seen with DSA were also seen with CTCVI. CTCVI identified all vessels seen on MR angiography. CONCLUSION: Helical CTCVI is an effective technique for assessing the intracranial circulation in children. In this initial comparison, CTCVI showed more vascular detail than MR angiography, and had fewer technical limitations. (+info)Ruptured aneurysm of the orbitofrontal artery associated with dural arteriovenous malformation in the anterior cranial fossa--case report. (7/621)
A 27-year-old male presented with a rare association of a ruptured orbitofrontal artery aneurysm and a dural arteriovenous malformation (DAVM) fed by both ethmoidal arteries, manifestation as severe headache, nausea, and vomiting. Computed tomography revealed a hematoma within the right frontal lobe and diffuse subarachnoid hemorrhage. The aneurysm was clipped successfully and the hematoma was evacuated. After an uneventful postoperative course, the patient was referred for gamma knife radiosurgery to treat the DAVM. In this case, the DAVM was asymptomatic and pathogenetically unrelated to the aneurysm, which demanded urgent treatment. (+info)Radiosurgery of cerebral arteriovenous malformations: is an early angiogram needed? (8/621)
BACKGROUND AND PURPOSE: Radiosurgical treatment of arteriovenous malformations (AVMs) has slow and progressive vasoocclusive effects. We sought to determine if early posttherapeutic angiography provides relevant information for the management of radiosurgically treated AVMs. METHODS: Between 1990 and 1993, the progress of 138 of 197 cerebral AVMs treated by linear accelerator (Linac) was regularly followed by angiographic study. On each posttherapeutic angiogram ("early," 6-18-month follow-up; "intermediate," 19-29-month-follow-up; and "late," > 30-month follow-up), the degree of reduction across the greatest diameter of the nidus and hemodynamic modifications were analyzed. Each cerebral AVM was qualitatively classified into one of the following categories after early angiographic study: 0%-reduced, 25%-reduced, 50%-reduced, 75%-reduced, and 100%-reduced or "complete obliteration." Vasoocclusive progress for each category was then studied over time. RESULTS: Three (10%) of the 30 0-25%-reduced, eight (38%) of 21 50%-reduced, and 27 (84%) of 32 75%-reduced cerebral AVMs showed complete obliteration after further follow-up. The three 0-25%-reduced AVMS that went on to complete obliteration underwent very early angiography (6-7 months). Fifty-five cerebral AVMs showed complete obliteration on early angiograms (40%). In this group, more follow-up, when performed, confirmed complete obliteration in all cases (n = 17). CONCLUSION: An early angiogram is needed to predict the effectiveness of radiosurgery. Important AVM changes seen on early angiograms are highly correlated with treatment success. Moreover, no or minor changes seen on early angiograms are highly predictive of radiosurgical failure. For these patients, further treatment should be discussed promptly. (+info)Intracranial arteriovenous malformations (AVMs) are abnormal, tangled connections between the arteries and veins in the brain. These connections bypass the capillary system, which can lead to high-flow shunting and potential complications such as hemorrhage, stroke, or neurological deficits. AVMs are congenital conditions, meaning they are present at birth, although symptoms may not appear until later in life. They are relatively rare, affecting approximately 0.1% of the population. Treatment options for AVMs include surgery, radiation therapy, and endovascular embolization, depending on the size, location, and specific characteristics of the malformation.
Arteriovenous malformations (AVMs) are abnormal tangles of blood vessels that directly connect arteries and veins, bypassing the capillary system. This results in a high-flow and high-pressure circulation in the affected area. AVMs can occur anywhere in the body but are most common in the brain and spine. They can vary in size and may cause symptoms such as headaches, seizures, or bleeding in the brain. In some cases, AVMs may not cause any symptoms and may only be discovered during imaging tests for other conditions. Treatment options include surgery, radiation therapy, or embolization to reduce the flow of blood through the malformation and prevent complications.
I'm sorry for any confusion, but "Polyvinyls" is not a medical term. It is a chemical term that refers to polymers made from vinyl chloride, which is used in the production of various plastics and resins. If you have any questions about medical terms or concepts, I'd be happy to help with those!
Therapeutic embolization is a medical procedure that involves intentionally blocking or obstructing blood vessels to stop excessive bleeding or block the flow of blood to a tumor or abnormal tissue. This is typically accomplished by injecting small particles, such as microspheres or coils, into the targeted blood vessel through a catheter, which is inserted into a larger blood vessel and guided to the desired location using imaging techniques like X-ray or CT scanning. The goal of therapeutic embolization is to reduce the size of a tumor, control bleeding, or block off abnormal blood vessels that are causing problems.
Cerebral angiography is a medical procedure that involves taking X-ray images of the blood vessels in the brain after injecting a contrast dye into them. This procedure helps doctors to diagnose and treat various conditions affecting the blood vessels in the brain, such as aneurysms, arteriovenous malformations, and stenosis (narrowing of the blood vessels).
During the procedure, a catheter is inserted into an artery in the leg and threaded through the body to the blood vessels in the neck or brain. The contrast dye is then injected through the catheter, and X-ray images are taken to visualize the blood flow through the brain's blood vessels.
Cerebral angiography provides detailed images of the blood vessels in the brain, allowing doctors to identify any abnormalities or blockages that may be causing symptoms or increasing the risk of stroke. Based on the results of the cerebral angiography, doctors can develop a treatment plan to address these issues and prevent further complications.
Digital subtraction angiography (DSA) is a medical imaging technique used to visualize the blood vessels and blood flow within the body. It combines the use of X-ray technology with digital image processing to produce detailed images of the vascular system.
In DSA, a contrast agent is injected into the patient's bloodstream through a catheter, which is typically inserted into an artery in the leg and guided to the area of interest using fluoroscopy. As the contrast agent flows through the blood vessels, X-ray images are taken at multiple time points.
The digital subtraction process involves taking a baseline image without contrast and then subtracting it from subsequent images taken with contrast. This allows for the removal of background structures and noise, resulting in clearer images of the blood vessels. DSA can be used to diagnose and evaluate various vascular conditions, such as aneurysms, stenosis, and tumors, and can also guide interventional procedures such as angioplasty and stenting.
Magnetic Resonance Angiography (MRA) is a non-invasive medical imaging technique that uses magnetic fields and radio waves to create detailed images of the blood vessels or arteries within the body. It is a type of Magnetic Resonance Imaging (MRI) that focuses specifically on the circulatory system.
MRA can be used to diagnose and evaluate various conditions related to the blood vessels, such as aneurysms, stenosis (narrowing of the vessel), or the presence of plaques or tumors. It can also be used to plan for surgeries or other treatments related to the vascular system. The procedure does not use radiation and is generally considered safe, although people with certain implants like pacemakers may not be able to have an MRA due to safety concerns.
Hereditary Hemorrhagic Telangiectasia (HHT) is a rare genetic disorder that affects the blood vessels. It is also known as Osler-Weber-Rendu syndrome. This condition is characterized by the formation of abnormal blood vessels called telangiectases, which are small red spots or tiny bulges that can be found in the skin, mucous membranes (like those inside the nose, mouth, and GI tract), and sometimes in vital organs like the lungs and brain.
These telangiectases have a tendency to bleed easily, leading to potentially serious complications such as anemia due to chronic blood loss, and in some cases, strokes or brain abscesses if the telangiectases in the brain rupture. HHT is typically inherited in an autosomal dominant pattern, meaning that a child has a 50% chance of inheriting the gene from an affected parent. There are several genes associated with HHT, the most common being ACVRL1, ENG, and SMAD4.
I apologize for any confusion, but "Enbucrilate" is not a medical term or a medication that I am aware of. It's possible that there might be some misunderstanding or misspelling in the term. If you have more context or information about where this term came from, I may be able to provide a more accurate and helpful response.
However, if you are referring to "bucrilate" which is a type of polymer used in some medical applications such as wound dressings, then it is a substance that can absorb large amounts of water and create a gel-like barrier between the wound and the outside environment, helping to keep the wound moist and promote healing.
If you have any further questions or concerns, please don't hesitate to ask.
Cerebral veins are the blood vessels that carry deoxygenated blood from the brain to the dural venous sinuses, which are located between the layers of tissue covering the brain. The largest cerebral vein is the superior sagittal sinus, which runs along the top of the brain. Other major cerebral veins include the straight sinus, transverse sinus, sigmoid sinus, and cavernous sinus. These veins receive blood from smaller veins called venules that drain the surface and deep structures of the brain. The cerebral veins play an important role in maintaining normal circulation and pressure within the brain.
I apologize for any confusion, but I am unable to provide a medical definition for "Bucrylate" because it is not a term recognized in the medical field. It is possible that there may be a typographical error or misunderstanding of the intended term. If you have more information about the substance you are asking about, I'd be happy to help you try to find the correct definition or provide information related to its uses, safety, or other relevant details.
Radiosurgery is a non-invasive surgical procedure that uses precisely focused beams of radiation to treat various medical conditions, primarily in the field of neurosurgery and oncology. It allows for the destruction of targeted tissue while minimizing damage to surrounding healthy structures. Unlike traditional surgery, radiosurgery does not require any incisions, as it delivers radiation through the skin to reach the intended target.
The term "stereotactic" is often associated with radiosurgery, which refers to the use of a three-dimensional coordinate system to precisely locate and target the affected area. This technique enables high doses of radiation to be delivered accurately and efficiently, maximizing therapeutic effectiveness while minimizing side effects.
Radiosurgery can be used to treat various conditions such as brain tumors (both malignant and benign), arteriovenous malformations (AVMs), trigeminal neuralgia, acoustic neuromas, pituitary adenomas, and spinal cord tumors. Common radiosurgery platforms include the Gamma Knife, CyberKnife, and linear accelerator-based systems like Novalis Tx or TrueBeam.
It is essential to note that although it is called "surgery," radiosurgery does not involve any physical incisions or removal of tissue. Instead, it relies on the destructive effects of high-dose radiation to ablate or damage targeted cells over time, leading to their eventual death and resolution of symptoms or tumor control.
An arteriovenous fistula is an abnormal connection or passageway between an artery and a vein. This connection causes blood to flow directly from the artery into the vein, bypassing the capillary network that would normally distribute the oxygen-rich blood to the surrounding tissues.
Arteriovenous fistulas can occur as a result of trauma, disease, or as a planned surgical procedure for patients who require hemodialysis, a treatment for advanced kidney failure. In hemodialysis, the arteriovenous fistula serves as a site for repeated access to the bloodstream, allowing for efficient removal of waste products and excess fluids.
The medical definition of an arteriovenous fistula is:
"An abnormal communication between an artery and a vein, usually created by surgical means for hemodialysis access or occurring as a result of trauma, congenital defects, or disease processes such as vasculitis or neoplasm."
Intracranial hemorrhage (ICH) is a type of stroke caused by bleeding within the brain or its surrounding tissues. It's a serious medical emergency that requires immediate attention and treatment. The bleeding can occur in various locations:
1. Epidural hematoma: Bleeding between the dura mater (the outermost protective covering of the brain) and the skull. This is often caused by trauma, such as a head injury.
2. Subdural hematoma: Bleeding between the dura mater and the brain's surface, which can also be caused by trauma.
3. Subarachnoid hemorrhage: Bleeding in the subarachnoid space, which is filled with cerebrospinal fluid (CSF) and surrounds the brain. This type of ICH is commonly caused by the rupture of an intracranial aneurysm or arteriovenous malformation.
4. Intraparenchymal hemorrhage: Bleeding within the brain tissue itself, which can be caused by hypertension (high blood pressure), amyloid angiopathy, or trauma.
5. Intraventricular hemorrhage: Bleeding into the brain's ventricular system, which contains CSF and communicates with the subarachnoid space. This type of ICH is often seen in premature infants but can also be caused by head trauma or aneurysm rupture in adults.
Symptoms of intracranial hemorrhage may include sudden severe headache, vomiting, altered consciousness, confusion, seizures, weakness, numbness, or paralysis on one side of the body, vision changes, or difficulty speaking or understanding speech. Rapid diagnosis and treatment are crucial to prevent further brain damage and potential long-term disabilities or death.
Vascular malformations are abnormalities in the development and growth of blood vessels and lymphatic vessels that can occur anywhere in the body. They can be present at birth or develop later in life, and they can affect both the form and function of the affected tissues and organs. Vascular malformations can involve arteries, veins, capillaries, and/or lymphatic vessels, and they can range from simple, localized lesions to complex, multifocal disorders.
Vascular malformations are typically classified based on their location, size, flow characteristics, and the type of blood or lymphatic vessels involved. Some common types of vascular malformations include:
1. Capillary malformations (CMs): These are characterized by abnormal dilated capillaries that can cause red or pink discoloration of the skin, typically on the face or neck.
2. Venous malformations (VMs): These involve abnormal veins that can cause swelling, pain, and disfigurement in the affected area.
3. Lymphatic malformations (LMs): These involve abnormal lymphatic vessels that can cause swelling, infection, and other complications.
4. Arteriovenous malformations (AVMs): These involve a tangled mass of arteries and veins that can cause high-flow lesions, bleeding, and other serious complications.
5. Combined vascular malformations: These involve a combination of different types of blood or lymphatic vessels, such as capillary-lymphatic-venous malformations (CLVMs) or arteriovenous-lymphatic malformations (AVLMs).
The exact cause of vascular malformations is not fully understood, but they are believed to result from genetic mutations that affect the development and growth of blood vessels and lymphatic vessels. Treatment options for vascular malformations depend on the type, size, location, and severity of the lesion, as well as the patient's age and overall health. Treatment may include medication, compression garments, sclerotherapy, surgery, or a combination of these approaches.
A cerebral hemorrhage, also known as an intracranial hemorrhage or intracerebral hemorrhage, is a type of stroke that results from bleeding within the brain tissue. It occurs when a weakened blood vessel bursts and causes localized bleeding in the brain. This bleeding can increase pressure in the skull, damage nearby brain cells, and release toxic substances that further harm brain tissues.
Cerebral hemorrhages are often caused by chronic conditions like hypertension (high blood pressure) or cerebral amyloid angiopathy, which weakens the walls of blood vessels over time. Other potential causes include trauma, aneurysms, arteriovenous malformations, illicit drug use, and brain tumors. Symptoms may include sudden headache, weakness, numbness, difficulty speaking or understanding speech, vision problems, loss of balance, and altered level of consciousness. Immediate medical attention is required to diagnose and manage cerebral hemorrhage through imaging techniques, supportive care, and possible surgical interventions.
Arnold-Chiari malformation is a structural abnormality of the brain and skull base, specifically the cerebellum and brainstem. It is characterized by the descent of the cerebellar tonsils and sometimes parts of the brainstem through the foramen magnum (the opening at the base of the skull) into the upper spinal canal. This can cause pressure on the brainstem and cerebellum, potentially leading to a range of symptoms such as headaches, neck pain, unsteady gait, swallowing difficulties, hearing or balance problems, and in severe cases, neurological deficits. There are four types of Arnold-Chiari malformations, with type I being the most common and least severe form. Types II, III, and IV are progressively more severe and involve varying degrees of hindbrain herniation and associated neural tissue damage. Surgical intervention is often required to alleviate symptoms and prevent further neurological deterioration.
Pulmonary veins are blood vessels that carry oxygenated blood from the lungs to the left atrium of the heart. There are four pulmonary veins in total, two from each lung, and they are the only veins in the body that carry oxygen-rich blood. The oxygenated blood from the pulmonary veins is then pumped by the left ventricle to the rest of the body through the aorta. Any blockage or damage to the pulmonary veins can lead to various cardiopulmonary conditions, such as pulmonary hypertension and congestive heart failure.
Dura Mater is the thickest and outermost of the three membranes (meninges) that cover the brain and spinal cord. It provides protection and support to these delicate structures. The other two layers are called the Arachnoid Mater and the Pia Mater, which are thinner and more delicate than the Dura Mater. Together, these three layers form a protective barrier around the central nervous system.
Angiography is a medical procedure in which an x-ray image is taken to visualize the internal structure of blood vessels, arteries, or veins. This is done by injecting a radiopaque contrast agent (dye) into the blood vessel using a thin, flexible catheter. The dye makes the blood vessels visible on an x-ray image, allowing doctors to diagnose and treat various medical conditions such as blockages, narrowing, or malformations of the blood vessels.
There are several types of angiography, including:
* Cardiac angiography (also called coronary angiography) - used to examine the blood vessels of the heart
* Cerebral angiography - used to examine the blood vessels of the brain
* Peripheral angiography - used to examine the blood vessels in the limbs or other parts of the body.
Angiography is typically performed by a radiologist, cardiologist, or vascular surgeon in a hospital setting. It can help diagnose conditions such as coronary artery disease, aneurysms, and peripheral arterial disease, among others.
X-ray computed tomography (CT or CAT scan) is a medical imaging method that uses computer-processed combinations of many X-ray images taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of the body. These cross-sectional images can then be used to display detailed internal views of organs, bones, and soft tissues in the body.
The term "computed tomography" is used instead of "CT scan" or "CAT scan" because the machines take a series of X-ray measurements from different angles around the body and then use a computer to process these data to create detailed images of internal structures within the body.
CT scanning is a noninvasive, painless medical test that helps physicians diagnose and treat medical conditions. CT imaging provides detailed information about many types of tissue including lung, bone, soft tissue and blood vessels. CT examinations can be performed on every part of the body for a variety of reasons including diagnosis, surgical planning, and monitoring of therapeutic responses.
In computed tomography (CT), an X-ray source and detector rotate around the patient, measuring the X-ray attenuation at many different angles. A computer uses this data to construct a cross-sectional image by the process of reconstruction. This technique is called "tomography". The term "computed" refers to the use of a computer to reconstruct the images.
CT has become an important tool in medical imaging and diagnosis, allowing radiologists and other physicians to view detailed internal images of the body. It can help identify many different medical conditions including cancer, heart disease, lung nodules, liver tumors, and internal injuries from trauma. CT is also commonly used for guiding biopsies and other minimally invasive procedures.
In summary, X-ray computed tomography (CT or CAT scan) is a medical imaging technique that uses computer-processed combinations of many X-ray images taken from different angles to produce cross-sectional images of the body. It provides detailed internal views of organs, bones, and soft tissues in the body, allowing physicians to diagnose and treat medical conditions.
Sleep deprivation is a condition that occurs when an individual fails to get sufficient quality sleep or the recommended amount of sleep, typically 7-9 hours for adults. This can lead to various physical and mental health issues. It can be acute, lasting for one night or a few days, or chronic, persisting over a longer period.
The consequences of sleep deprivation include:
1. Fatigue and lack of energy
2. Difficulty concentrating or remembering things
3. Mood changes, such as irritability or depression
4. Weakened immune system
5. Increased appetite and potential weight gain
6. Higher risk of accidents due to decreased reaction time
7. Health problems like high blood pressure, diabetes, and heart disease over time
Sleep deprivation can be caused by various factors, including stress, shift work, sleep disorders like insomnia or sleep apnea, poor sleep hygiene, and certain medications. It's essential to address the underlying causes of sleep deprivation to ensure proper rest and overall well-being.
A seizure is an uncontrolled, abnormal firing of neurons (brain cells) that can cause various symptoms such as convulsions, loss of consciousness, altered awareness, or changes in behavior. Seizures can be caused by a variety of factors including epilepsy, brain injury, infection, toxic substances, or genetic disorders. They can also occur without any identifiable cause, known as idiopathic seizures. Seizures are a medical emergency and require immediate attention.
In the context of medical terminology, tablets refer to pharmaceutical dosage forms that contain various active ingredients. They are often manufactured in a solid, compressed form and can be administered orally. Tablets may come in different shapes, sizes, colors, and flavors, depending on their intended use and the manufacturer's specifications.
Some tablets are designed to disintegrate or dissolve quickly in the mouth, making them easier to swallow, while others are formulated to release their active ingredients slowly over time, allowing for extended drug delivery. These types of tablets are known as sustained-release or controlled-release tablets.
Tablets may contain a single active ingredient or a combination of several ingredients, depending on the intended therapeutic effect. They are typically manufactured using a variety of excipients, such as binders, fillers, and disintegrants, which help to hold the tablet together and ensure that it breaks down properly when ingested.
Overall, tablets are a convenient and widely used dosage form for administering medications, offering patients an easy-to-use and often palatable option for receiving their prescribed treatments.
Electroencephalography (EEG) is a medical procedure that records electrical activity in the brain. It uses small, metal discs called electrodes, which are attached to the scalp with paste or a specialized cap. These electrodes detect tiny electrical charges that result from the activity of brain cells, and the EEG machine then amplifies and records these signals.
EEG is used to diagnose various conditions related to the brain, such as seizures, sleep disorders, head injuries, infections, and degenerative diseases like Alzheimer's or Parkinson's. It can also be used during surgery to monitor brain activity and ensure that surgical procedures do not interfere with vital functions.
EEG is a safe and non-invasive procedure that typically takes about 30 minutes to an hour to complete, although longer recordings may be necessary in some cases. Patients are usually asked to relax and remain still during the test, as movement can affect the quality of the recording.
Absence epilepsy is a type of epilepsy characterized by recurrent brief episodes of "absences," or staring spells, that can last from a few seconds to several minutes. These episodes are often accompanied by subtle body movements such as lip smacking or eyelid flutters. Absence epilepsy is most commonly diagnosed in children and adolescents, and it is more common in girls than boys.
The seizures in absence epilepsy are caused by abnormal electrical activity in the brain, specifically in a part of the brain called the cortex. These abnormal electrical discharges occur in a pattern that involves both sides of the brain simultaneously. This differs from other types of epilepsy, which may involve only one side of the brain or specific areas within a single hemisphere.
Absence seizures are typically brief and do not cause confusion or disorientation after they end. However, if they occur frequently, they can interfere with learning and social development. In some cases, absence epilepsy may be associated with other types of seizures, such as generalized tonic-clonic (grand mal) seizures or myoclonic jerks.
The diagnosis of absence epilepsy is usually made based on the characteristic symptoms and the results of an electroencephalogram (EEG), which can detect the abnormal electrical activity in the brain during a seizure. Treatment typically involves medication to control the seizures, such as ethosuximide or valproic acid. In some cases, a ketogenic diet may also be recommended as an alternative treatment option.
I'm sorry for any confusion, but "pamphlets" is not a medical term. It refers to a small paper booklet or leaflet that can be used to provide information on various topics, including non-medical subjects. If you have any questions about medical terminology or concepts, I'd be happy to help with those!
Neurology is a branch of medicine that deals with the study and treatment of diseases and disorders of the nervous system, which includes the brain, spinal cord, peripheral nerves, muscles, and autonomic nervous system. Neurologists are medical doctors who specialize in this field, diagnosing and treating conditions such as stroke, Alzheimer's disease, epilepsy, Parkinson's disease, multiple sclerosis, and various types of headaches and pain disorders. They use a variety of diagnostic tests, including imaging studies like MRI and CT scans, electrophysiological tests like EEG and EMG, and laboratory tests to evaluate nerve function and identify any underlying conditions or abnormalities. Treatment options may include medication, surgery, rehabilitation, or lifestyle modifications.
Miguel A. Faria Jr.
Philip Stieg
Ethylene vinyl alcohol
Venous hum
Alexander L. Coon
Positron emission tomography
1932 in science
Center for Cerebrovascular Research
Radiosurgery
Brain positron emission tomography
Onyx (interventional radiology)
Neuroimaging
Computed tomography of the head
Thrombolysis
Magnetic resonance imaging
CT scan
Neurosurgical anesthesia
List of MeSH codes (C16)
List of diseases (I)
List of MeSH codes (C14)
T2*-weighted imaging
Stroke
Dural arteriovenous fistula
Vascular malformation
Arteriovenous malformation
Intracranial aneurysm
Intraparenchymal hemorrhage
Streptokinase
Aneurysm
Intracranial hemorrhage
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AVMs27
- Luschka and Virchow originally described arteriovenous malformations (AVMs) in the mid 1800s. (medscape.com)
- For small, intracranial AVMs distortion correction did not significantly reduce the errors associated with the definition of the stereotactic co-ordinates. (karger.com)
- OBJECTIVE: Giant arteriovenous malformations (AVMs) (i.e., those greater than 6 cm at maximum diameter) are difficult to treat and often carry higher treatment morbidity and mortality rates than do smaller AVMs. (elsevierpure.com)
- Background: Brain arteriovenous malformations (AVMs) are intracranial lesions that consist of a complex tangle of abnormal blood vessels. (aku.edu)
- To report our experience in treatment of arteriovenous malformations (AVMs) using a new liquid embolic agent, Onyx (Micro Therapeutics, Inc., Irvine, CA). (nih.gov)
- Participants were screened for visceral arteriovenous malformations (AVMs). (nih.gov)
- Intracranial arteriovenous malformations (AVMs) are characterized by feeding arteries, a tangle of abnormal vessels (nidus) and draining veins. (dissertations.se)
- Dr. Malek's clinical expertise includes the multi-modal and minimally invasive treatment of brain arteriovenous malformations (AVMs) and dural arteriovenous fistulas (DAVFs). (tuftsmedicalcenter.org)
- Wyburn-Mason syndrome (WMS), also known as Bonnet-Dechaume-Blanc syndrome or retinoencephalofacial angiomatosis, is a rare nonhereditary congenital phakomatosis characterized by arteriovenous malformations (AVMs) of the retina, brain, and, in some cases, facial skin. (medscape.com)
- What are arteriovenous malformations (AVMs)? (medlineplus.gov)
- Arteriovenous malformations (AVMs) are defects in your vascular system . (medlineplus.gov)
- How are arteriovenous malformations (AVMs) diagnosed? (medlineplus.gov)
- Artero-venous malformations (AVMs) located in eloquent area are associated with significant risk of neurological deterioration, especially in patients presenting with unruptured AVMs and minimal or no neurological deficits. (researchsquare.com)
- A total of 31 patients suffering from intracranial AVMs have been operated on in our Department. (researchsquare.com)
- Brain arteriovenous malformations (AVMs) consist of a complex tangle of pathologic vessels causing shunting between arteries and veins within the surrounding brain tissue [17]. (researchsquare.com)
- The coexistence of hyper-inflow aneurysms and cerebellopontine angle cistern (CPAc) arterial venous malformations (AVMs) have been rarely reported and most commonly associated with high risk of bleeding. (surgicalneurologyint.com)
- Only 8-12% of intracranial aneurysms and 5-15% of arterial venous malformations (AVMs) occur in the posterior circulation. (surgicalneurologyint.com)
- Low-grade arteriovenous malformations (AVMs) associated with multiple flow-related distal anterior cerebral artery (DACA) aneurysms are rare occurrences. (surgicalneurologyint.com)
- OBJECTIVE: Arteriovenous malformations (AVMs) of the medial temporal lobe are usually resected through subtemporal-transcortical approaches that provide a trajectory that is perpendicular to the plane of the AVM. (barrowneuro.org)
- In this study we report and analyze the results of a multimodality management concept for intracranial arteriovenous malformations (AVMs), including microsurgery, embolization, and gamma knife radiosurgery. (jku.at)
- The study population consists of a consecutive series of 294 patients treated for 304 intracranial AVMs over a 10-year period. (jku.at)
- Seven adult participants, 4 male and 3 female, with unruptured, surgically unresectable intracranial AVMs were prospectively enrolled in the study, with a mean age of 42.1 years and Spetzler-Martin grade range of II-IV. (biomedcentral.com)
- This study is the first to quantitatively assess human brain cortical folding in the presence of intracranial AVMs and no significant differences between AVM-affected versus unaffected hemispheres were found in a small dataset. (biomedcentral.com)
- Intracranial arteriovenous malformations (AVMs) are the direct communication of arteries to abnormally tortuous and dilated veins without an interposing capillary bed, often described as a tangle or "bag of worms" [ 1 ]. (biomedcentral.com)
- Unlike their pulmonary or abdominal counterparts, brain AVMs have long been thought to be congenital malformations situated in often eloquent, functional brain parenchyma. (biomedcentral.com)
- If AVMs are truly congenital lesions of the intracranial vascular system, there is a poorly understood interaction between the processes of AVM formation and cortical folding. (biomedcentral.com)
- It is considered one of the nonhereditary congenital phakomatoses and is characterized by arteriovenous malformations (AVMs) that affect the retina, visual pathways, midbrain, and facial structures. (medscape.com)
Aneurysm8
- An actuarial analysis showed the risk of intracranial hemorrhage among patients with coexisting aneurysm and AVM to be 7% per year at 5 years following diagnosis compared to 1.7% for patients with AVM alone. (thejns.org)
- These data suggest that the intracranial AVM's predispose to aneurysm formation within AVM feeding systems and that the mechanism is not simply based upon the high blood flow or high arteriovenous shunt in these systems. (thejns.org)
- The association of arteriovenous angioma and saccular aneurysm of the arteries of the brain. (thejns.org)
- 101 - 110 , 1959 Anderson RM, Blackwood W: The association of arteriovenous angioma and saccular aneurysm of the arteries of the brain. (thejns.org)
- Wyburn-Mason R. Arteriovenous aneurysm of midbrain and retina, facial naevi and mental changes. (medscape.com)
- The cases were collected from the data base containing all of the patients who had undergone endovascular treatment for their intracranial aneurysm since the start of the endovascular coiling activity in our hospital on December 1993 until March 2008. (ajnr.org)
- Association of cerebral arteriovenous malformation and cerebral aneurysm. (biu.ac.il)
- Dive into the research topics of 'Association of cerebral arteriovenous malformation and cerebral aneurysm. (biu.ac.il)
Embolization4
- Endovascular embolization can be an effective treatment option for selected cerebral arteriovenous malformations and dural arteriovenous fistulas. (ajnr.org)
- The principle of endovascular embolization is occlusion of the pathological blood vessels of the underlying vascular malformation using a microcatheter, which is selectively positioned within or proximal to the pathology, by injection of an occlusive substance into these vessels. (springer.com)
- LEAs that are available for the embolization of cerebral vascular malformations can basically be divided into two groups: cyanoacrylates or adhesive embolic agents, which have a glue-like behavior (colloquially they are often named glue) and copolymers or nonadhesive embolic agents, which are described to feature lava-like or rubber-like characteristics. (springer.com)
- Pipeline embolization device (PED) has proved its safety and efficacy in the treatment of intracranial large and giant side-wall aneurysms. (biomedcentral.com)
Hemorrhage4
- BACKGROUND: Brain arteriovenous malformations (BAVMs) are a tangle of abnormal vessels directly shunting blood from the arterial to venous circulation and an important cause of intracranial hemorrhage (ICH). (kaiserpermanente.org)
- Ten of the aneurysms presented with an acute intracranial hemorrhage, and 2 were incidental imaging findings. (ajnr.org)
- Conclusions: For patients with BAVMs, although the overall risk for hemorrhage seems to be 2.10% -4.12% per year, calculating an accurate risk profile for decision making involves clinical attention and accounting for specific features of the malformation. (elsevierpure.com)
- On admission, head CT was negative for intracranial hemorrhage. (bvsalud.org)
Vascular8
- McCormick published an influential classification system in "The Pathology of Vascular ('Arteriovenous') Malformations. (medscape.com)
- Venous angiomas are enlarged collections of veins and are the most common type of intracranial vascular malformation. (medscape.com)
- Brain capillary telangiectasias are slow-flow vascular malformations composed of dilated capillary-like vessels, are classically located in the pons, and are typically benign and discovered incidentally. (medscape.com)
- 4. Gao B., Baharoglu M.I., Cohen A.D., Malek A.M. Stent-Assisted Coiling Of Intracranial Bifurcation Aneurysms Leads to Immediate and Delayed Intracranial Vascular Angle Remodeling. (tuftsmedicalcenter.org)
- The first broadly used copolymer-based embolic agent Onyx benefits from a large amount of available experience and data, which demonstrated its safety and efficacy in the treatment of cerebral vascular malformations, while its drawbacks include temporary loss of visibility during longer injections and artifacts in cross-sectional imaging. (springer.com)
- [ 1 ] Other vascular malformations may be present elsewhere in the body, including facial skin. (medscape.com)
- Schmidt D. [Congenital retinocephalic facial vascular malformation syndrome. (medscape.com)
- BACKGROUND: Cerebral cavernous malformations (CCMs) are common sporadic and inherited vascular malformations of the central nervous system. (icr.ac.uk)
Lesions1
- The arteriovenous (AV) shunt is the definitive characteristic of these lesions. (medscape.com)
Fistulas1
- Between 2003 and 2011, IOA was performed during surgical treatment of 976 aneurysms, 97 AVM, and 16 arteriovenous fistulas (AVF) in our institution. (cns.org)
Tumors1
- He focuses on treating stroke, carotid stenosis, intracranial aneurysms, arteriovenous malformation, pituitary tumors and other skull base tumors. (uky.edu)
Giant intracranial1
- Since its approval by FDA in 2011, PED (ev3, USA) has proved its safety and efficacy in the treatment of large and giant intracranial aneurysms from the petrous to the superior hypophyseal segment of the internal carotid artery [ 1 , 2 ]. (biomedcentral.com)
Radiosurgery2
- The published literature maintains that distortion correction of digital subtraction angiography is essential for accurate definition of the arteriovenous malformation (AVM) nidus when performing Gamma Knife radiosurgery. (karger.com)
- Purpose: To clarify the feasibility and effectiveness of intra-arterial CT angiography (IACTA) for treatment planning of arteriovenous malformation radiosurgery. (elsevierpure.com)
Arteries1
- Twenty-five aneurysms were on arteries feeding the malformation system, almost equally distributed proximally and distally. (thejns.org)
Cavernous2
- Intracranial, extracerebral cavernous angiomas also occur but are less common. (medscape.com)
- Somatic PIK3CA Mutations in Sporadic Cerebral Cavernous Malformations. (icr.ac.uk)
Vasculature2
- The dilated and abnormal retinal vasculature characteristic of a retinal arteriovenous malformation. (medscape.com)
- To date, no hypothesis or human study explains what happens in the 16 week interval between intracranial vasculature maturation and cortical folding initiation [ 6 ]. (biomedcentral.com)
Angiography2
- Is Distortion Correction Necessary for Digital Subtraction Angiography in the Gamma Knife Treatment of Intra-Cranial Arteriovenous Malformations? (karger.com)
- In an era of indocyanine angiography (ICG), the routine use of intra-operative angiography (IOA) in the surgical treatment of intracranial aneurysms and arteriovenous malformation (AVM) is controversial. (cns.org)
Stenosis1
- Noninvasive imaging of asymptomatic brain aneurysms, arteriovenous malformations, and intracranial arterial stenosis became available. (hindawi.com)
BAVMs1
- Object: The authors aimed to systematically review the literature to clarify the natural history of brain arteriovenous malformations (BAVMs). (elsevierpure.com)
Aneurysms associated2
- All five aneurysms associated with low-shunt malformations were on a direct arterial feeder of the malformation. (thejns.org)
- Proximal PICA aneurysms located at the vertebral artery-PICA junction or at anteromedullary segment and flow-related aneurysms associated with brain arteriovenous malformations were excluded. (ajnr.org)
Nidus1
- This axial T2-weighted MRI shows arteriovenous malformation nidus on the right side. (medscape.com)
Endovascular treatment1
- The acute origin angle of the vessel from the basilar artery made both malformations unsuitable for endovascular treatment. (surgicalneurologyint.com)
Artery4
- Flow-related aneurysms in the region of distal anterior cerebral artery (DACA) are a rare occurrence, accounting for 9% of the total intracranial aneurysms with multiple aneurysms on the same vessel are rarer. (surgicalneurologyint.com)
- 10 ] We present an unusual case of a low-grade arteriovenous malformation (AVM) with three associated DACA aneurysms arising from a single feeder to an AVM from the left callosomarginal artery. (surgicalneurologyint.com)
- Head computed tomography angiogram at the time of presentation revealing a compact arteriovenous malformation in the left frontal lobe and three aneurysms in the distal anterior cerebral artery region. (surgicalneurologyint.com)
- Posterior inferior cerebellar artery (PICA) aneurysms account for approximately 0.5% to 3.0% of all intracranial aneurysms, 1 , 2 and most are located right at the origin or in the first anteromedullary segment of the vessel. (ajnr.org)
Patients1
- Among 91 patients with unruptured intracranial arteriovenous malformations (AVM's), 16 patients had 26 unruptured intracranial saccular aneurysms. (thejns.org)
Shunt1
- Four (16%) of 25 low-shunt malformations and 12 (18%) of 65 high-shunt malformations had associated aneurysms. (thejns.org)
Methods1
- Methods: The authors searched PubMed for one or more of the following terms: natural history, brain arteriovenous malformations, cerebral arteriovenous malformations, and risk of rupture. (elsevierpure.com)
Treatment3
- By the conclusion of this session, participants should be able to: 1) Discuss the safety and efficacy of IOA during surgical treatment of intracranial aneurysms, AVM, and AVF. (cns.org)
- We conclude that IACTA is a practical and useful method for radiosurgical treatment planning of arteriovenous malformations. (elsevierpure.com)
- The gold-standard treatment for chordomas is en-bloc surgical resection with wide margins followed by radiation therapy. (virtualmedstudent.com)
Hemorrhage5
- Intracranial arteriovenous malformation (AVM) is a common cause of primary intracerebral hemorrhage in young adults. (nih.gov)
- Seizures were present at diagnosis in one case, but none presented with intracranial hemorrhage or hydrocephalus. (ajnr.org)
- The Predictors of Spontaneous Cerebral AVM Hemorrhage study was designed to identify genetic markers that predict adverse outcomes in brain arteriovenous malformation (BAVM) patients, examine race-ethnicity influences on BAVM hemorrhage risk, and use genome-wide association analysis to identify novel genetic predictors of AVM and hemorrhage using the Affymetrix GeneChip. (nih.gov)
- In serious cases, the blood vessels rupture and there is bleeding within the brain (intracranial hemorrhage). (rochester.edu)
- More than 50% of patients with an AVM have an intracranial hemorrhage. (stroke.org)
Aneurysm5
- 36. Vessel wall enhancement of a ruptured intra-nidal aneurysm in a brain arteriovenous malformation. (nih.gov)
- Dr. Hassan is known and recognized for his research in stroke, artificial intelligence, advanced imaging, antiplatelet use, advanced aneurysm and AVM treatment as well as the latest in intracranial stenting. (nih.gov)
- Some scholars defined them as cerebral arteriovenous malformations of large size (malformation group may be up to about 6 cm in length) combined with aneurysm and cerebral vascular occlusion involving functional areas, deep brain, and multivessel blood supply [ 1 ]. (biomedres.info)
- The detection of a feeder aneurysm and an arteriovenous malformation (AVM) is relatively rare for the intracranial AVM. (biomedcentral.com)
- The lesions included 16 arteriovenous malformation (AVM)s (Spetzler-Martin grade 2 in 8, 3 in 6 and 4 in 2), 9 arteriovenous (AV) fistulas, 2 tumors (glomus tumor and angiofibroma) and 1 AICA aneurysm. (turkishneurosurgery.org.tr)
Congenital3
- Vein of Galen aneurysmal malformations (VGAMs) are rare congenital abnormalities that can cause severe morbidity and mortality, particularly in neonates but also in infants and older children (1−8). (ajnr.org)
- Congenital arteriovenous malformation involving the VEIN OF GALEN, a large deep vein at the base of the brain. (ouhsc.edu)
- Complex cerebral arteriovenous malformations (AVM) are a series of congenital local cerebrovascular alteration. (biomedres.info)
Spetzler-Martin2
- 21. Endovascular transvenous cure for ruptured brain arteriovenous malformations in complex cases with high Spetzler-Martin grades. (nih.gov)
- The Spetzler-Martin arteriovenous malformation (AVM) grading system was described as a method of estimating the mortality and morbidity of surgical resection to guide treatment recommendations. (medscape.com)
FISTULA1
- Based on preoperative cerebral angiography, computerized tomography angiography, and magnetic resonance imaging, the incidentally discovered lesion was originally thought to be a direct arteriovenous fistula with an associated varix. (elsevierpure.com)
Cerebral arteriovenou1
- A cerebral arteriovenous malformation (AVM) is an abnormal connection between the arteries and veins in the brain. (rochester.edu)
Radiosurgery3
Cerebellar arteriovenous1
- 25. Anatomic and angiographic findings of cerebellar arteriovenous malformations: Report of a single center experience. (nih.gov)
Aneurysms Associated2
Stroke1
- These data may be applied to examine the genetic contributions to arteriovenous malformation, stroke, and related vascular disorders and may help generate hypotheses regarding the genetics of cerebrovascular disease. (nih.gov)
TUMORS1
- A subdural hematoma can also be caused by trauma, aneurysmal rupture, intracranial bleeding, arteriovenous malformations, or tumors [42]. (royaltanks.com)
Vein of Ga6
- Neonates with vein of Galen aneurysmal malformations (VGAMs) presenting with cardiac failure have high morbidity and mortality, and outcomes are significantly better in those presenting in later childhood. (ajnr.org)
- Vein of Galen Malformations" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (ouhsc.edu)
- This graph shows the total number of publications written about "Vein of Galen Malformations" by people in this website by year, and whether "Vein of Galen Malformations" was a major or minor topic of these publications. (ouhsc.edu)
- Below are the most recent publications written about "Vein of Galen Malformations" by people in Profiles. (ouhsc.edu)
- Spontaneously disappearing pineal region mass: a rare manifestation of vein of galen malformation. (ouhsc.edu)
- The high risks of ventriculoperitoneal shunt procedures for hydrocephalus associated with vein of Galen malformations in childhood: case report and literature review. (ouhsc.edu)
Flow-related aneurysms2
- BACKGROUND: Previous reports indicated an association between hemorrhagic presentation and flow-related aneurysms in arteriovenous malformation (AVM) patients. (elsevierpure.com)
- 32. Interdisciplinary clinical management of high grade arteriovenous malformations and ruptured flow-related aneurysms in the posterior fossa. (nih.gov)
Pathology1
- McCormick published an influential classification system in "The Pathology of Vascular ('Arteriovenous') Malformations. (medscape.com)
Moyamoya1
- The authors report the unique case of a 6-year-old African-American girl with sickle cell disease (SCD) and an associated moyamoya arteriopathy who developed a de novo arteriovenous malformation (AVM) of the cerebral circulation. (elsevierpure.com)
Tangle of blood vessels1
- When an arteriovenous malformation (AVM) occurs, a tangle of blood vessels in the brain bypasses normal brain tissue and directly diverts blood from the arteries to the veins. (stroke.org)
Diagnosis1
- The molecular data (individual genetic data) for the Phase 1 discovery cohort 338 BAVM cases (self-reported Caucasian) recruited at University of California, San Francisco, or Kaiser Permanente of Northern California (KPNC) are included in the dbGaP Study Report: Brain Arteriovenous Malformation Genetics Study, with the additional BAVM case phenotypic and sample attribute characteristics: sex, race, age at BAVM diagnosis, hemorrhagic presentation, BAVM size. (nih.gov)
Treatment4
- Although a muscle plug embolus was intentionally introduced through the ICA in 1930, [ 23 ] it was many years before endo vascular treatment for any intracranial pathological condition gained popularity. (medscape.com)
- 35. Long-term treatment outcome of venous-predominant arteriovenous malformation. (nih.gov)
- Despite rapid developments in devices used to treat arteriovenous malformation (AVM), a randomised trial of Unruptured Brain Arteriovenous malformations published in 2014 recommended conservative treatment for nonhemorrhagic AVM. (researchsquare.com)
- The results of A Randomised trial of Unruptured Brain Arteriovenous malformations (ARUBA) published in 2014[1] offered the opportunity to reconsider the treatment strategy for nonhemorrhagic-onset brain arteriovenous malformation (AVM). (researchsquare.com)
Outcomes3
- Ren Q, He M, Zeng Y, Liu Z, Liu H, Xu J. Microsurgery for intracranial arteriovenous malformation: Long-term outcomes in 445 patients. (medscape.com)
- Schramm J, Schaller K, Esche J, Boström A. Microsurgery for cerebral arteriovenous malformations: subgroup outcomes in a consecutive series of 288 cases. (medscape.com)
- Burkhardt JK, Lasker GF, Winkler EA, Kim H, Lawton MT. Microsurgical resection of brain arteriovenous malformations in the elderly: outcomes analysis and risk stratification. (medscape.com)
Embolisation1
- Conclusion We were able to safely and successfully perform endovascular embolisation of a series of intra-cranial arterial malformations using a new robust but small diameter microcatheter in combination with Onyx or n-BCA after successful navigation of this microcatheter to the nidal or fistulous point over a 0.014 wire system. (bmj.com)
Clinical2
- Intracranial varices are not of significant current clinical concern. (medscape.com)
- 31. Management and clinical outcome of posterior fossa arteriovenous malformations: report on a single-centre 15-year experience. (nih.gov)
Multicenter1
- 26818729 ) of sporadic BAVM to investigate association of common single nucleotide polymorphisms (SNPs) with risk of sporadic BAVM in the international, multicenter Genetics of Arteriovenous Malformation (GEN-AVM) consortium. (nih.gov)
Surgical1
- 27. Comparative surgical outcome associated with the management of brain arteriovenous malformation in a regional neurosurgical centre. (nih.gov)