Title :
Circadian reference values for different endpoints of heart rate variability
Author :
Otsuka, K. ; Cornelissen, G. ; Shinagawa, M. ; Nishimura, Y. ; Kubo, Y. ; Hotta, N. ; Fujii, C. ; Ishii, T. ; Omori, K. ; Watanabe, Y. ; Nunoda, S. ; Ohkawa, S. ; Halberg, F.
Author_Institution :
Dept. of Med., Tokyo Women´´s Med. Univ., Tokyo, Japan
fDate :
6/21/1905 12:00:00 AM
Abstract :
While it is known that endpoints of HRV undergo a circadian variation, time-specified reference value ranges are lacking. To fill this void, peer-group reference standards are presented. They are derived on the basis of data from 219 healthy males in 8 age groups:5-10 years, 10-20 years, 20-30 years, 30-40 years, 40-50 years, 50-60 years, 60-70 years and>70 years, and from 117 healthy females in 4 age groups:<20 years, 20-40 years, 40-60 years, and>60 years. The spectral Q component (Q for quadrisecundan, rather than “HF”) and the D/Q ratio (D for decisecundan, rather than “LF/HF”) were computed hourly for 24 hours. Time-specified reference limits (chronodesms) were computed for each variable in each group as 90% prediction limits. Circadian chronodesms in different age groups indicate that both Q and D/Q vary greatly as a function of age. Chronodesms here proposed may serve for evaluating risk and the efficacy of various interventions
Keywords :
biocontrol; cardiovascular system; diseases; medical signal processing; spectral analysis; time series; 10 to 20 yr; 20 to 30 yr; 20 to 40 yr; 24 hr; 30 to 40 yr; 40 to 50 yr; 40 to 60 yr; 5 to 10 yr; 50 to 60 yr; 60 to 70 yr; age groups; autonomic nervous system; chronodesms; circadian reference values; circadian variation; coronary artery disease; decisecundan; endpoints; healthy females; healthy males; heart rate variability; interventions; peer-group reference standards; prediction limits; quadrisecundan; risk evaluation; spectral Q component; time-specified reference value ranges; Autonomic nervous system; Chronobiology; Coronary arteriosclerosis; Diseases; Frequency measurement; Hafnium; Heart rate variability; Hospitals; Laboratories; Time domain analysis;
Conference_Titel :
Computers in Cardiology, 1999
Conference_Location :
Hannover
Print_ISBN :
0-7803-5614-4
DOI :
10.1109/CIC.1999.826039
