Short- versus long-term ECG recordings for the assessment of non-linear heart rate variability parameters after beating heart myocardial revascularization.
Non-linear analyses of heart rate dynamics reveal subtle changes not evident from conventional heart rate variability measures. Traditionally, the information was inferred from 24-hour ECG recordings, making it less suitable for clinical application. Moreover, only few studies have attempted to evaluate the reliability of non-linear analyses in relation to varying proportion of artifacts in tracings. In 67 patients revascularized with beating-heart technique, fractal dimension and detrended fluctuation analyses were obtained from 24-hour Holter and 15-minute high-resolution ECG recordings pre and postoperatively. We found strong correlations of non-linear indices between 24-hour and 15-minute recordings (0.54-0.77, p<0.001), unaffected by proportion of artifacts.
Ksela
Jus
J
Department of Cardiac Surgery, University Clinical Center Maribor, Slovenia. jusksela@yahoo.com
Kalisnik
Jurij Matija
JM
Avbelj
Viktor
V
Vidmar
Gaj
G
Suwalski
Piotr
P
Suwalski
Grzegorz
G
Suwalski
Kazimierz
K
Gersak
Borut
B
D000368:Aged; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods; D009204:Myocardial Revascularization