Causes of Arteriovenous Malformation

Causes of Arteriovenous Malformation (Diseases Database):

The follow list shows some of the possible medical causes of Arteriovenous Malformation that are listed by the Diseases Database:

• Cobb's syndrome
• Parkes Weber syndrome
• Intracranial arteriovenous malformation
• Hereditary haemorrhagic telangiectasia
• Pulmonary arterio-venous malformation

Arteriovenous Malformation as a symptom:

Conditions listing Arteriovenous Malformation as a symptom may also be potential underlying causes of Arteriovenous Malformation. Our database lists the following as having Arteriovenous Malformation as a symptom of that condition:

• Sturge-Weber Syndrome

Related information on causes of Arteriovenous Malformation:

As with all medical conditions, there may be many causal factors. Further relevant information on causes of Arteriovenous Malformation may be found in:

• Hidden causes of Arteriovenous Malformation

Causes of Arteriovenous Malformation: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the causes of Arteriovenous Malformation.

Jugular Venous Distension: Differential Diagnosis
(In a Page: Signs and Symptoms)

• Congestive heart failure
• Constrictive pericarditis
• Cardiac tamponade
• Superior vena cava syndrome
• Tricuspid regurgitation
• Heart block (most often complete heart block)
• Atrial fibrillation
• Right ventricular infarction
• Tricuspid stenosis
• Right ventricular dilation
• Hypervolemia

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Source: In a Page: Signs and Symptoms, 2004

Arteriovenous malformations: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Although some AVMs occur as a result of penetrating injuries such as trauma, most are present at birth. However, symptoms typically don’t occur until between the ages 10 and 20. Very large AVMs may short-circuit blood flow enough to cause cardiac decompensation, in which the heart can’t pump enough blood to compensate for bleeding in the brain. This typically occurs in infants and young children.

The vessels of an AVM are very thin and one or more arteries feed into it, causing it to appear dilated and tortuous. Typically, high-pressured arterial flow moves into the venous system through the connecting channels to increase venous pressure, engorging and dilating the venous structures. If the AVM is large enough, the shunting can deprive the surrounding tissue of adequate blood flow. Thin-walled vessels may ooze small amounts of blood — they may even rupture — causing hemorrhage into the brain or subarachnoid space.

Cerebral arteriovenous malformations occur in approximately 3 out of 10,000 people. Although the lesion is present at birth, symptoms may occur at any time. Two-thirds of cases occur before age 40. Evidence suggests that AVMs run in families. Males and females are affected equally.

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Source: Professional Guide to Diseases (Eighth Edition), 2005