Heart rate

Heart rate
The number of heart beats per unit time, usually per minute. The heart rate is based on the number of contractions of the ventricles (the lower chambers of the heart). The heart rate may be too fast (tachycardia) or too slow (bradycardia). The pulse is bulge of an artery from the wave of blood coursing through the blood vessel as a result of the heart beat. The pulse is often taken at the wrist to estimate the heart rate.

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heart rate n a measure of cardiac activity usu. expressed as number of beats per minute see maximum heart rate

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the number of contractions of the ventricles of the heart per unit of time (usually a minute). It usually corresponds to the pulse rate, but occasionally some of the contractions of the left ventricle fail to produce peripheral pulse waves, so that the rate of the pulse at the wrist is less than that of the heart.

Medical dictionary. 2011.

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