1/f spectrum slope of 24 hour heart rate variability signal in normal and hypertensive subjects

Author

Calcagnini, G., Jr. ; Lino, S. ; Strano, S. ; Cerutti, S. ; Calcagnini, G.

Author_Institution

Istituto di Malattie Tropicale ed Infettive, La Sapienza Univ., Rome, Italy

fYear

1993

fDate

5-8 Sep 1993

Firstpage

543

Lastpage

545

Abstract

The power spectrum density of the heart rate beat to beat variability signal shows, in a frequency range of less than 0.01 Hz, a behaviour inversely proportional to frequency. This finding has been related to the chaotical component of the signal and the expression of the complexity of the heart rate control mechanisms. The authors tested the 1/f mathematical model on the 24 hour heart rate in 40 subjects, half normal and half young essential hypertensive. The authors found that 1/f slope is 1.12±0.14 in the normal subjects and 1.24±0.15 in the hypertensive ones (p<0.02). The data suggest a loss of complexity in cardiovascular control in essential hypertension

Keywords

electrocardiography; medical signal processing; spectral analysis; 1/f mathematical model; 1/f spectrum slope; 24 h; 24 hour heart rate variability signal; cardiovascular control complexity loss; frequency range; heart rate control mechanisms; normal subjects; power spectrum density; signal chaotical component; young essential hypertensive subjects; Autocorrelation; Cardiology; Chaos; Equations; Heart rate; Heart rate variability; Hypertension; Mechanical factors; Proportional control; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1993, Proceedings.

Conference_Location

London

Print_ISBN

0-8186-5470-8

Type

conf

DOI

10.1109/CIC.1993.378382

Filename

378382