arteriovenous malformation

(redirected from Arterio-venous malformation)

arteriovenous malformation

Neurology A potentially fatal congenital intracranial anomaly with large arteries feeding in a mass of communicating vessels which empty into large draining veins filled with 'arterialized' blood; large AVMs produce a shunt large enough to ↑ cardiac output Location Brain, medulla, spinal cord Clinical Headaches, seizures, subarachnoid hemorrhage Imaging CT, MRI, endovascular angiography ASAP


(mal?for-ma'shon) [ mal- + formation]
Abnormal shape or structure, esp. congenital; deformity.

arteriovenous malformation

Abbreviation: AVM

cavernous malformation (of the brain)

A collection of tiny blood vessels surrounded by neural tissue, found in the brain on MR scans, but not easily seen with cerebral angiography. If these blood vessels rupture, they may cause headaches or seizures.

spinal cavernous malformation

A cavernous malformation in the spinal cord. If the abnormal veins in the malformation rupture, a patient may suffer stroke-like symptoms that correspond to the nerves at the level of the spinal cord where the hemorrhage occurs.

tooth malformation

Abnormalities of size and shape that usually occur during the morphodifferentiation stage of tooth formation. Incomplete matrix formation or mineralization will also result in defective teeth that may or may not be abnormal in shape initially.

arteriovenous malformation

An abnormal, congenital network or clump of blood vessels linking an artery and a vein. These may occur anywhere in the body but are especially dangerous within the skull. The commonest presentation is a SUBARACHNOID HAEMORRHAGE. Blood flow though an arteriovenous malformation is often rapid and may be audible through the skull with a stethoscope.

Arteriovenous malformation

An abnormal tangle of arteries and veins in which the arteries feed directly into the veins without a normal intervening capillary bed.
References in periodicals archive ?
Causes of intracranial haemorrhage Intracerebral haematoma Subarachnoid haemorrhage Hypertensive haemorrhage Aneurysm Amyloid angiopathy Peri-mesencephalic bleed Arterio-venous malformation Arterio-venous malformation Aneurysmal haemorrhage Pituitary apoplexy Haemorrhagic tumour Drug abuse Dural sinus fistula Anticoagulant drugs Infarct with haemorrhagic Pituitary apoplexy transformation Venous infarct with Anticoagulant drugs haemorrhagic transformation
3) confirmed a left temporal lobe arterio-venous malformation with secondary intracerebral bleeding as well as a well-defined, enlarged venous pouch in keeping with a vein of Galen malformation.
The condition, arterio-venous malformation or AVM, was diagnosed in March last year and she was being treated at the Walton centre where the surgery was suggested two weeks ago.
Gd+ lesions in 1 of the 2 Gd+ patients in the interferon alfa-n3 group were found to be due to an arterio-venous malformation of the corpus callosum, and not MS-related new active lesions.
These hydrogels can be used for the treatment of aneurysms, fistulae, arterio-venous malformations, and vessel occlusions.
Important considerations in our country (India) are tuberculoma, neurocysticercosis, metastatic deposits, lymphomas, primary brain tumors like glioma, toxoplasmosis, arterio-venous malformations (AVM), and vasculitis (1,2).
Previously doctors were conducting long operation for cerebral arterio-venous malformations which took a long time for healing the wound.
Food and Drug Administration (FDA) to commercialize its Onyx(R) Liquid Embolic System (Onyx) for the treatment of arterio-venous malformations (AVMs), a vascular disorder in the brain.
The first liquid polymer material on the market indicated for pre-surgical treatment of arterio-venous malformations (AVMs), Onyx will provide neurointerventionists across the United States with a valuable treatment option.
The primary growth drivers for the Neurovascular segment were the continued market penetration of both the Onyx Liquid Embolic System for the treatment of brain arterio-venous malformations (AVMs) and the Nexus family of embolic coils for the treatment of brain aneurysms.
Over 163,000 hospital admissions are made with the diagnosis of hemorrhagic stroke, including ruptured aneurysms, arterio-venous malformations (AVMs), fistulas and other pathologies.
Rapid diagnosis and treatment is crucial in life-threatening situations requiring emergency treatment, such as brain aneurysms and arterio-venous malformations.