Stroke

Definition

A stroke occurs when the blood supply to part of the brain is interrupted or reduced, preventing brain tissue from getting oxygen and nutrients. Brain cells begin to die in minutes.

Related terms

Ischemic Stroke: An ischemic stroke happens when an artery to the brain is blocked, reducing blood flow and oxygen to the brain.

Hemorrhagic Stroke: A hemorrhagic stroke occurs when a blood vessel in the brain leaks or ruptures, leading to bleeding inside or around the brain.

Transient Ischemic Attack (TIA): Often called a mini-stroke, a TIA is a temporary period of symptoms similar to those of a stroke but usually lasts only a few minutes and causes no permanent damage