Linear measures of heart rate variability (HRV) during ECG stress test has been widely questioned due to the high signal non-stationary. Such limitations can be overcome by nonlinear measures of HRV based on typical properties of chaotic systems and deterministic fractal. Very few paper addressed such issue and aim of the paper is to describe fractal behavior of HRV during exercise. A fractal analysis by Higuchi's algorithm (FD) has been performed on 26 cardiac patients during resting, stress, early and late recovery phases of ECG stress test. Results showed a significant FD increasing values from resting to stress phase that was not recovered at all immediately after the exercise, and it was slightly recovered both during early and late recovery phase. The performance of fractal analysis of HRV during and after high intensity exercise suggests that it could be a useful index assessing relevant information about underlying physiological recovery. ?????? 2014 IEEE.
Fractal behavior of heart rate variability during ECG stress test in cardiac patients / D'Addio, Giovanni; Romano, Maria; Maresca, L; Bifulco, Paolo; Fornasa, E; Giallauria, F; Cesarelli, Mario; Vigorito, Carlo. - (2014), pp. 155-156. (Intervento presentato al convegno 8th Conference of the European Study Group on Cardiovascular Oscillations tenutosi a Trento nel 2014) [10.1109/ESGCO.2014.6847566].
Fractal behavior of heart rate variability during ECG stress test in cardiac patients
D'ADDIO, Giovanni;ROMANO, MARIA;BIFULCO, PAOLO;Giallauria F;CESARELLI, MARIO;VIGORITO, CARLO
2014
Abstract
Linear measures of heart rate variability (HRV) during ECG stress test has been widely questioned due to the high signal non-stationary. Such limitations can be overcome by nonlinear measures of HRV based on typical properties of chaotic systems and deterministic fractal. Very few paper addressed such issue and aim of the paper is to describe fractal behavior of HRV during exercise. A fractal analysis by Higuchi's algorithm (FD) has been performed on 26 cardiac patients during resting, stress, early and late recovery phases of ECG stress test. Results showed a significant FD increasing values from resting to stress phase that was not recovered at all immediately after the exercise, and it was slightly recovered both during early and late recovery phase. The performance of fractal analysis of HRV during and after high intensity exercise suggests that it could be a useful index assessing relevant information about underlying physiological recovery. ?????? 2014 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
