7 lines
786 B
Text
7 lines
786 B
Text
Heart rate variability (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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The "Daily Heart Rate Variability Summary" files include daily granularity recordings of your HRV during a sleep. The description for the values of each row is as follows:
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rmssd: Root mean squared value of the successive differences of time interval between successive heart beats., measured during sleep.
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nremhr: Heart rate measured during non-REM sleep (i.e. light and deep sleep stages).
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entropy: Entropy quantifies randomness or disorder in a system. High entropy indicates high HRV. Entropy is measured from the histogram of time interval between successive heart beats values measured during sleep.
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