(triple rhythm) a third heart sound, which in association with a fast heart rate resembles the sound of a galloping horse. It is a sign of left ventricular failure (see heart failure).
A method of CONTRACEPTION which attempts to prevent conception by avoiding intercourse during the fertile part of the menstrual cycle. (See MENSTRUATION; SAFE PERIOD.)... rhythm method
a normal heart rhythm, usually as recorded on an electrocardiogram. The *sinoatrial node, located in the right atrium, normally functions as the natural pacemaker for the heart.... sinus rhythm
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