Gallop rhythm
| Gallop rhythm | |
|---|---|
| Classification and external resources | |
| ICD-9 | 427.9, 785.3 |
A gallop rhythm refers to a (usually abnormal) rhythm of the heart on auscultation.1 It includes three or four sounds,2 thus resembling the sounds of a gallop.
The normal heart rhythm contains two audible heart 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.
Associated conditions
Gallop rhythms may be heard in young or athletic people, but may also be a sign of serious cardiac problems like heart failure as well as pulmonary edema.
References
- ^ Tavel ME (November 1996). "The appearance of gallop rhythm after exercise stress testing". Clin Cardiol 19 (11): 887–91. doi:10.1002/clc.4960191109. PMID 8914783.
- ^ "gallop rhythm" at Dorland's Medical Dictionary
External links
- chfpatients.com - suitable for non-medical people, but requires some knowledge of medical terms
- familypractice.com - requires knowledge of medical terms
- Kuo PT, Schnabel TG, Blakemore WS, Whereat AF (1957). "Diastolic gallop sounds, the mechanism of production". J. Clin. Invest. 36 (7): 1035–42. doi:10.1172/JCI103499. PMC 1072690. PMID 13449156.
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