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A-V Malformation

September 29, 2016 by

A-V Malformation

A haemangioma or arteriovenous malformation is a tangle of abnormal vessels that forms an abnormal communication between the arterial and venous systems. Most are developmental (congenital). If large enough, they may produce a shunt of sufficient magnitude to raise the cardiac output. AVM's may occur in the brain, brainstem and spinal cord, where they may cause headaches, seizures or bleeding (subarachnoid hemorrhage).

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