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IMDb.com, Inc. takes no responsibility for the content or accuracy of the above news articles, Tweets, or blog posts. This content is published for the entertainment of our users only. The news ...

S1 and S2 are the normal heart sounds you hear when the heart valves close. Heart murmurs are extra sounds that can be heard during systole, diastole, or as a continuous sound. S3 and S4 are abnormal ...

The S1 heart sound happens when the tricuspid and mitral valves close. A loud S1 may mean there is a problem with the heart, like mitral stenosis or tachycardia. Mitral stenosis is when the mitral ...