Health A-Z: Stroke


A stroke is a brain injury that occurs because the brain’s blood supply is interrupted. The brain’s blood supply can be disrupted for different reasons. Doctors generally classify strokes into three categories, depending on the cause: Hemorrhagic stroke, Thrombotic stroke, or Embolic stroke.


Related Article(s)

More on the Stroke Belt study - Health A-Z

Maria Glymour and her colleagues at the Harvard School of Public Health conducted their study of the Stroke Belt by using data from the 1980, 1990, and 2000 censuses and mortality data from the National Center for Health Statistics… Read More

Migraines: Can dementia, stroke or heart attack be next? - Health A-Z

New Harvard research confirms some links, rejects others.Two new studies from Harvard examine the possible associations between migraine headaches and other conditions. One study offers encouraging news: the headaches will not hurt thinking skills. Another study suggests a warning:… Read More

What Do You Know About Blood Clots - Health Awareness

A blood clot that blocks blood flow in the coronary arteries can cause a heart attack. A stroke occurs when a blood clot blocks a vessel that supplies blood to the brain. A… Read More

Metabolic Syndrome Increases Risks for Other Disease - Health A-Z

Some doctors call this the "most common condition you've never heard of." It affects almost 50 million Americans, yet many of them don't know it. Metabolic syndrome isn't just one condition; it's a combination of problems. You have metabolic… Read More
How Hypertension Harms Your Health

How Hypertension Harms Your Health - Health A-Z

Hypertension operates with great stealth. Although it seldom produces symptoms, the intense pounding of blood associated with it gradually damages artery walls. Small arteries are especially vulnerable. The walls respond by thickening and losing their elasticity and strength. As… Read More
Hypertension is the Leading Cause of Stroke

Hypertension is the Leading Cause of Stroke - Health A-Z

Untreated hypertension is the leading cause of stroke, which is the third leading killer in the United States. Two-thirds of people having a first stroke have blood pressures that are higher than 160/95 mm Hg. An… Read More
1 of 3123
  • About PEC

    The Patient Education Center provides multimedia access to reliable and relevant medical information at and beyond the point of care. Our content is developed exclusively by Harvard Health Publications, the media and publishing division of the Harvard Medical School of Harvard University, and distributed by Health Media Network.