Nonlinear analyses of heart rate variability in hypertension

Annales de cardiologie et d'angéiologie
B K KoichubekovI V Korshukov

Abstract

The autonomic nervous system plays an important role in blood pressure regulation and in the development of hypertension. Heart rate variability (HRV) may be of importance in identifying subjects at higher risk of developing hypertension. In the present study, comparative analysis of HRV for normal and hypertension subjects using nonlinear indices has been carried out. We analyzed the data from 24 patients with essential hypertension aged 45-55 (HG). All the subjects in this group had a confirmed diagnosis of the first- or second-stage essential hypertension. The control group for these subjects included 32 healthy volunteers of the same age group (CG). We analyzed the whole 5minutes of the ECG recording. Nonlinear indices D2, K2 and lagged Poincaré plot indices were calculated. Values of D2 and K2 in hypertension state is statistically significantly lower than in healthy. Poincaré plot indices SD1 and SD2 in healthy volunteers are statistically higher than in hypertensive patients for all lags (P<0,05). SD1/SD2 ratio is also higher in healthy subjects, but the difference is statistically significant only for l=5 and 6. The heart rhythm in groups with hypertension is more regular, its dynamics are less complex and less "chaotic...Continue Reading

Citations

Sep 12, 2018·Journal of Medical Engineering & Technology·S G CaliskanM D Bilgin
Dec 22, 2020·Frontiers in Medicine·Kathleen BirdMohamed Elgendi
Mar 6, 2021·Journal of Arrhythmia·Rerdin JularioBudi Baktijasa Dharmadjati
Jun 3, 2021·International Journal of Environmental Research and Public Health·Manish SharmaU Rajendra Acharya
Mar 17, 2020·Computers in Biology and Medicine·Desmond Chuang Kiat SohU Rajendra Acharya

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