Prevalence Of 'Silent' Heart Attacks Revealed With New Imaging Technology

So-called "silent" heart attacks may be much more common than previously believed, according to researchers. Studies show that each year, nearly 200,000 people in the US suffer a heart attack but may not realize it. These "silent" heart attacks aren't noted because they don't cause any pain -- or at least any pain that patients believe is related to their heart -- and they don't leave behind any telltale irregularities on electrocardiograms.

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