- Gallop rhythm
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MeshID =A gallop rhythm refers to a (usually abnormal) rhythm of the heart on
auscultation . The normal heart rhythm contains two audibleheart sounds called S1 and S2 that give the well-known "lub-dub" rhythm; they are caused by the closing of valves in the heart. A gallop rhythm contains another sound, called S3 or S4, dependent upon where in the cycle this added sound comes. It can also contain both of these sounds forming a quadruple gallop, and in situations of very fast heart rate can produce a summation gallop where S3 and S4 occur so close as to be indistinguishable. Gallop rhythms may be heard in young or athletic people, but may also be a sign of serious cardiac problems likeheart failure .External links
* [http://www.chfpatients.com/faq/s3s4.htm chfpatients.com] - suitable for non-medical people, but requires some knowledge of medical terms
* [http://www.familypractice.com/heartlab/heartlab.htm?main=/heartlab/Text/gallop_sounds.htm familypractice.com] - requires knowledge of medical terms
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