Cardiovascular disease, risk factors, and heart rate variability in the general population
Abstract: The results of studies into the prognostic value of heart rate variability (HRV) for cardiac and all-cause mortality in the general population are briefly reviewed, and the effect of various recording durations of the electrocardiogram (ECG) on HRV parameters is assessed. Heart rate variability parameters offer prognostic information beyond that of traditional risk factors. In the elderly, increased HRV measured on a 10-second ECG is an even stronger indicator of cardiac death than decreased HRV. Estimated of HRV obtained from 10-second ECGs have moderate to poor correlation with those from 5- or 20-minute ECGs.