Causes of Stroke
Different strokes are caused by different factors.
• Ischemic stroke: These occur when there is a narrowing or blockage of arteries to the brain, causing blood flow to be reduced severely. There are 2 main types of Ischemic stroke
Thrombotic stroke. The formation of a thrombus, or a clot in the blood, in an artery that supplies blood to your brain causes a thrombotic stroke.
Embolic stroke. When a clot in the blood from another part of the body gets swept into the bloodstream and narrows an artery that supplies blood to the brain, it leads to an embolic stroke.
• Hemorrhagic stroke: A leak or rupture in a blood vessel in the brain leads to a hemorrhagic stroke. There are 2 main kinds of hemorrhagic strokes:
Intracerebral hemorrhage. This condition is characterized by brain cells getting damaged due to a blood carrier in a part of the brain bursting and spilling into brain tissue adjacent to it.
Subarachnoid hemorrhage. This condition is characterized by bleeding that begins in one of the artery that is near or on the top layer of your brain, buts leaks into the area that is between the skull and the surface of the brain.
• Transient Ischemic Attack: Also called a mini stroke, it is a momentary reduction in the supply of blood to a part of the brain.