Changes in heart rhythm power spectrum during human aging.
Age-related changes of the major oscillatory components--low-frequency (LFC, 0.02-0.05 Hz), medium-frequency (MFC, 0.08-0.12 Hz) and high-frequency (HFC, 0.2-0.4 Hz)--in the heart rhythm (HR) power spectrum were studied in 256 healthy subjects 20 to 89 years of age. The age factor exerted a considerable effect on the characteristics of the HR power spectrum. The decrease in the total power of the HR power spectrum and in HFC and MFC showed a nonlinear pattern. LFC power showed a linear decrease with aging. In view of the marked decrease in HFC and MFC in the 30- to 59-year age range, the elderly and very elderly subjects demonstrated the prevalence of the LFC contribution to the total HR power spectrum.
Korkushko
O V
OV
Institute of Gerontology, A.M.S., U.S.S.R., Kiev.
Shatilo
V B
VB
Kaukenas
J K
JK
D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D001146:Arrhythmia, Sinus / Q000503:physiopathology; D001794:Blood Pressure / Q000502:physiology; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D011311:Pressoreceptors / Q000502:physiology