User:Mr. Ibrahem/Arteriovenous malformation

Arteriovenous malformation is an abnormal connection between an artery and vein, without intervening capillaries. Often no symptoms are present, though sometimes pain, seizures, or stroke symptoms may occur. Complications may include bleeding (~4% of cases), steal syndrome, or heart failure.

Types include AVMs of the brain and spinal cord, though any part of the body may be involved. The cause in most cases is unclear. Risk factors for brain AVMs include hereditary hemorrhagic telangiectasia. Diagnosis is usually confirmed by medical imaging.

AVMs may be treated with surgical removal, endovascular embolization, or stereotactic radiosurgery. If issues have not occurred by the age of 50, they are unlikely to occur. Cerebral AVMs newly occur in about 1.3 people per 100,000 per years. Males and females are affected equally. Death occurs as a result, in about 1% of those affected. AVMs were first described in the mid-1800s.