The coherence spectrum for quantifying beat-to-beat adaptation of RT intervals to heart rate in normal subjects and in postinfarction patients

This paper studies the frequency modulation of RT-interval variability and its common variations to the RR-interval signals in 21 normal subjects and in 49 patients after myocardial infarction. The coherence function was used to measure these common variations. Additionally, the spectral analysis of...

Full description

Saved in:
Bibliographic Details
Published in1996 Computers in Cardiology pp. 669 - 672
Main Authors Sosnowski, M., Czyz, Z., Leski, J., Petelenz, T., Tendera, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1996
Subjects
Cardiology
Electrocardiography
Frequency domain analysis
Frequency modulation
Heart rate
Heart rate interval
Myocardium
Nervous system
Noise level
Spectral analysis
Online AccessGet full text

Cover

More Information
Summary:This paper studies the frequency modulation of RT-interval variability and its common variations to the RR-interval signals in 21 normal subjects and in 49 patients after myocardial infarction. The coherence function was used to measure these common variations. Additionally, the spectral analysis of R-wave amplitude variability was performed to obtain the respiratory frequency. The coherence spectrum revealed the greatest relation between RRV and RTV in the range of high frequencies (0.24 Hz in controls, 0.27 Hz in patients). The magnitude of the coherence spectra were only slightly lower in patients (0.649+/-0.211), as compared to controls (0.806+/-0.163). The means of coherence spectra correlated significantly to the respiratory rate (R=0.79).
ISBN:0780337107
9780780337107
ISSN:0276-6547
DOI:10.1109/CIC.1996.542625