Heartbeat

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Heartbeat

A heartbeat (/ˈhɑːrtbiːt/; from Old English heorte "heart" + beat "to strike") is a pulsation of the heart, which includes the simultaneous contraction of the two atria, followed by the contraction of the two ventricles of the heart. This is also known as a cardiac cycle.

Etymology

The term "heartbeat" is derived from the Old English words heorte meaning "heart" and beat meaning "to strike". It was first used in the 14th century to describe the pulsation of the heart.

Pronunciation

The term "heartbeat" is pronounced as /ˈhɑːrtbiːt/.

Related Terms

  • Cardiac cycle: The sequence of events that occur when the heart beats. It includes the diastole, the systole, and the intervening pause.
  • Systole (medicine): The part of the cardiac cycle during which the ventricles contract and pump blood into the arteries.
  • Diastole: The part of the cardiac cycle during which the heart refills with blood after the systole (contraction).
  • Pulse: The rhythmic dilation of an artery resulting from beating of the heart. It is often measured by feeling the arteries of the wrist.
  • Electrocardiogram: A record or display of a person's heartbeat produced by electrocardiography.

See Also

External links

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