2009-04-17 "Silent" heart attacks more common than thought

http://www.reuters.com/article/2009/04/18/us-heart-attack-idUSTRE53G58220090418

(Reuters) - A study using new imaging technology found "silent" heart attacks may be far more common, and more deadly, than suspected, U.S. researchers said Friday.

Some studies estimate that these often painless heart attacks, also known as unrecognized myocardial infarctions, affect 200,000 people in the United States each year.

But Dr. Han Kim of Duke University in North Carolina suspects the numbers may be far higher. (Read entire article)

2009-04-21 'Silent' heart attacks more common than thought, study says

http://articles.cnn.com/2009-04-21/health/silent.heart.attacks_1_silent-heart-heart-attacks-risk-factors?_s=PM:HEALTH

Although many people think of a heart attack as a painful, sometimes fatal event, there are some heart attacks that go entirely unnoticed.

Undiagnosed, or "silent," heart attacks affect nearly 200,000 people in the United States annually. As many as 40 to 60 percent of all heart attacks are unrecognized, studies show.

By definition, a heart attack usually happens when a clot gets in the way of blood flow from a coronary artery to the heart. This may cause symptoms such as severe chest pain, shortness of breath, fainting and nausea. Anyone who believes that he or she is having a heart attack should seek emergency medical attention.(Read entire article)