Heart period dynamics following an asphyxia experiment in rats

L. Moraru1, L. Cimponeriu1, A. Bezerianos1
1Department of Medical Physics, School of Medicine, University of Patras, Greece

Tóm tắt

The present work proposes an optimal symbol dynamics transformation as an approach to analyze dynamic aspects of heart rate variability (HRV) in an asphyxia experiment in rats. The approximate entropy (ApEn) was used to quantify the regularity of short symbolic sequences derived from 5 min R-R intervals (RRI). The comparison of several symbol transformations applied in HRV analysis indicates our approach as optimal for characterizing the transitions between different phases in the recovery process following asphyxia in rats.

Từ khóa

#Asphyxia #Rats #Heart rate variability #Entropy #Electrocardiography #Nonlinear dynamical systems #Cardiology #Time measurement #Rail to rail inputs #Heart rate

Tài liệu tham khảo

10.1063/1.166090 10.1007/s003990070035 ebeling, 2000, Entropy, complexity, predictability and data analysis of time series and letter sequences, Theories of disaster 10.1016/0008-6363(96)00008-9 10.1063/1.51037 schafer, 1995, Methodology for analysis of binary sequences in heart rate, Wien-Med-Wochenschr, 145, 521 10.1073/pnas.88.6.2297 seppanen, 1996, Abnormalities in beat to beat complexity of heart rate dynamics in patients with a previous myocardial infarction, J Am Coli Cardiol, 28, 1005, 10.1016/S0735-1097(96)00243-4 10.1016/S0002-9149(97)00799-6 10.1152/ajpheart.00559.2001 geocadin, 2000, A novel quantitative EEG injury measure of global cerebral ischemia, Clinical Neurophysiology, 11, 1779, 10.1016/S1388-2457(00)00379-5 10.1161/01.CIR.96.9.3224