Declining Trends of Heart Rate Variability According to Aging in Healthy Asian Adults.

The values of all HRV indices showed a decreasing trend with age in healthy Korean adults, as observed in the Western population ( P < 0.001 for all indices); HF ( Y = −0.039x + 6.833, R 2 = 0.287), LF ( Y = −0.047x + 7.197, R 2 = 0.414), VLF ( Y = −0.025x + 6.861, R 2 = 0.177), TP ( Y = −0.034x + 8.082, R 2 = 0.352), HRV-index ( Y = −0.125x + 15.628, R 2 = 0.298), SDNN ( Y = −0.502x + 53.907, R 2 = 0.343), and pNN50 ( Y = −0.650x + 53.852, R 2 = 0.345) all decreased with age.

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The entire Korean group in this study did not show gender differences in all HRV indices of HF, LF, VLF, TP, SDNN, HRV-index, and pNN50, which showed a trend similar to the SDNN and LF of Japanese people.

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