heart rate variability - Search - Sleep Data - National Sleep Research Resource

Sleep Heart Health Study

The Sleep Heart Health Study (SHHS) is a multi-center cohort study implemented by the National Heart Lung & Blood Institute to determine the cardiovascular and other consequences of sleep-disordered breathing.

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Instantaneous heart rate

ihr under Heart Rate Variability (HRV) Analysis in CHAT

Total normal sinus to normal sinus interbeat (NN) interval spectral power up to 0.4 Hz

tot_pwr under Heart Rate Variability (HRV) Analysis in CHAT

Instantaneous heart rate

ihr under HRV Analysis in SHHS

The ratio of low to high frequency power

lf_hf under Heart Rate Variability (HRV) Analysis in CHAT

5 minute window start time

start__sec_ under Heart Rate Variability (HRV) Analysis in CHAT

Mean of all normal sinus to normal sinus interbeat intervals (NN)

avnn under Heart Rate Variability (HRV) Analysis in CHAT

1 or more respiratory events in 5 minute window

hasrespevent under Heart Rate Variability (HRV) Analysis in CHAT

Standard deviation of all normal sinus to normal sinus interbeat (NN) intervals

sdnn under Heart Rate Variability (HRV) Analysis in CHAT

Mean of the standard deviations of normal sinus to normal sinus interbeat (NN) intervals in all 5-minute segments

sdnnidx under Heart Rate Variability (HRV) Analysis in CHAT

Sleep stage of second 30 second epoch in 5 minute window

sleepstage02 under Heart Rate Variability (HRV) Analysis in CHAT