Brain ischemia occurs due to reduced blood flow to the brain, often caused by atherothrombosis, embolism, or hemodynamic instability. This can lead to infarction of brain tissue, with symptoms dependent on the affected brain vessel. Embolism can also cause sudden blockage of a brain artery, resulting in hypoperfusion and infarct. Watershed infarction occurs when cerebral blood flow is critically lowered, often due to cardiac pump failure or severe hypovolemia. | Rajiv Kumar | Facebook

Stroke - Diagnosis and treatment - Mayo Clinic

Difference between Stroke and Heart Attack Stock Footage - Video of ischemia, biology: 298348950