Heart rate

Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute. The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide. It is also modulated by numerous factors, including genetics, physical fitness, stress or psychological status, diet, drugs, hormonal status, environment, and disease/illness, as well as the interaction between these factors.

It is usually equal or close to the pulse rate measured at any peripheral point.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 2.0

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