Strep untreated can cause heart damage

February 27, 2009 Most cases, once treated, will pass without any serious complications.

But the American Heart Association warns one particular strain can cause a condition called rheumatic fever if left untreated. That may trigger scarring on the heart valves, which leads to a lifetime of heart disease.

The AHA says patients should be sure to be checked out, have a throat culture and get on a course of antibiotics if a doctor deems it necessary.

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