(HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval.
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(HRV) is the physiological phenomenon of variation in the time interval between heartbeats. It is measured by the variation in the beat-to-beat interval. <ref>https://www.psiram.com/de/index.php/Herzfrequenzvariabilit%C3%A4t (allemand)</ref>