Stroke

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Definition Symptoms Causes Risk factors Complications

Preparing for your appointment Tests and diagnosis Treatments and drugs Coping and support Prevention

Definition

A stroke occurs when the blood supply to a part of your brain is interrupted or severely reduced, depriving brain tissue of oxygen and nutrients. Within a few minutes, brain cells begin to die.

Stroke is a medical emergency, and prompt treatment of a stroke is crucial. Early treatment can minimize damage to your brain and potential stroke complications.

The good news is that strokes can be treated, and many fewer Americans now die of strokes than was the case 20 or 30 years ago. Improvement in the control of major risk factors for stroke — high blood pressure, smoking and high cholesterol — is likely responsible for the decline.

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Symptoms