Medically reviewed by Nicholas R. Metrus, MD Key Takeaways The posterior communicating artery (PCOM) connects to the internal ...

Approximately 20% of ischemic strokes involve the posterior circulation, primarily supplied by the vertebrobasilar system. While much is known about the stroke risk of vertebrobasilar stenotic disease ...

The posterior inferior cerebellar artery (or PICA) is an artery that provides blood flow to the cerebellum, a part of the brain located behind the top of the brain stem, which helps with functions ...

Thrombolytic agents, including tenecteplase, are generally used within 4.5 hours after the onset of stroke symptoms. Information on whether tenecteplase confers benefit beyond 4.5 hours is limited. We ...

A 32 year-old woman developed the abrupt onset of a severe headache followed by a brief loss of consciousness. CT scan showed diffuse subarachnoid hemorrhage. On hospital day 7, she developed lethargy ...

Vasospasm following Subarachnoid Hemorrhage. Cerebral angiogram, Left vertebral artery injection, AP view. (Left) Hospital day 1; (Right) Hospital day 5. Note the severe narrowing of the intracranial ...