Overview

After heart disease and cancer, stroke has been ranked as the third leading cause of death in the United States. Stroke, defined as a sudden onset of focal neurologic deficiency, is due to interruption of blood flow to the brain. Blood flow may be impaired due to structural abnormalities in blood vessels or blockage of vessels due to thrombi. The two major categories of stroke include hemorrhagic and ischemic.

 

Hemorrhagic Stroke

Due to trauma or elevated blood pressure resulting in the rupture of an artery. Blood presses or displaces brain tissue.

 

Ischemic Stroke

A decrease in blood flow in the brain due to atherosclerosis, vasoconstriction, aneurysms, or other abnormalities in blood vessels obstructing adequate blood flow. This type of stroke can have noncardiogenic or cardiogenic sources.

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This information is for educational purposes only and is not a substitute for formal education or training. Advice on the treatment or care of an individual patient should be obtained through consultation with a physician who has examined that patient or is familiar with that patient's medical history.

Last Updated: April 24, 2003