Stroke
Stroke (also known as Brain Attack) occurs when blood supply to the brain is affected due to either blockage or leakage (or both blockage and leakage) of a blood vessel responsible for supplying or draining blood to and from the brain, thereby, causing brain damage leading to difficulty in movements, sensation, speaking, vision etc. or at times to death.
A stroke occurs when the blood supply to part of your brain is interrupted or reduced, preventing brain tissue from getting oxygen and nutrients. Brain cells begin to die in minutes.
Types of Stroke
Ischemic Stroke:In India about 70-75% of all strokes are ischemic, in which blood flow to the brain is blocked by blood clots or fatty deposits (also known as plaque) in blood vessel linings.
Hemorrhagic Stroke:It occurs when a blood vessel leaks in the brain. Blood accumulates and compresses the surrounding brain tissue. This is also called ‘Brain hemorrhage.
Intracerebral hemorrhage: It is the most common type of hemorrhagic stroke. It occurs when an artery in the brain leaks, flooding the surrounding tissue with blood.
Subarachnoid hemorrhage: It is bleeding in the area between the brain and its covering consisting of layers of tissue.
Transient ischemic attack (TIA) is a “warning stroke” or a “mini-stroke” that results in no lasting damage. Recognizing and treating TIAs immediately can reduce your risk of a major stroke.