Sleep Disorders
Sleep and mental disorders
Sep. 13, 2024
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High-flow arteriovenous shunt: initial diagnostic digital subtraction angiography
Anteroposterior (left) and lateral (right) digital subtraction angiography images obtained by contrast injection in the right external carotid artery show ectasia of the middle meningeal artery (arrow), which connects directly to the superior sagittal sinus through a fistulous point (asterisk), resulting in a high flow arteriovenous shunt. (Contributed by Kristine Ann Blackham MD.)