What is meaning of Heart beat?
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1 : one complete pulsation of the heart. 2 : the vital center or driving impulse. 3 : a brief space of time : flash —used chiefly in the phrase in a heartbeat.
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A heartbeat is a two-part pumping action that takes about a second. As blood collects in the upper chambers (the right and left atria), the heart's natural pacemaker (the SA node) sends out an electrical signal that causes the atria to contract.
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