In healthy subjects across all age groups, the directional coupling from respiration to the parasympathetic control of the heart rate was significantly stronger than the coupling in the opposite direction (p < 0.001), with the asymmetry most pronounced during deep sleep.
Observational (n=96)
Yes
In healthy subjects across all age groups, respiration exerts a stronger directional influence on the parasympathetic control of heart rate than vice versa, particularly during deep sleep.
Absolute Event Rate: 0.24% vs 0.15%
p-value: p=<0.001
Cardiorespiratory interactions are important, both for understanding the fundamental processes of functioning of the human body and for development of methods for diagnostics of various pathologies. The properties of cardiorespiratory interaction are determined by the processes of autonomic control of blood circulation, which are modulated by the higher nervous activity. We study the directional couplings between the respiration and the process of parasympathetic control of the heart rate in the awake state and different stages of sleep in 96 healthy subjects from different age groups. The detection of directional couplings is carried out using the method of phase dynamics modeling applied to experimental RR-intervals and the signal of respiration. We reveal the presence of bidirectional couplings between the studied processes in all age groups. Our results show that the coupling from respiration to the process of parasympathetic control of the heart rate is stronger than the coupling in the opposite direction. The difference in the strength of bidirectional couplings between the considered processes is most pronounced in deep sleep.
Borovkova et al. (Tue,) conducted a observational in Healthy (n=96). Respiration and sleep stages was evaluated on Directional coupling indices between respiration and parasympathetic control of the heart rate (ρ2max vs ρ1max) (p=<0.001). In healthy subjects across all age groups, the directional coupling from respiration to the parasympathetic control of the heart rate was significantly stronger than the coupling in the opposite direction (p < 0.001), with the asymmetry most pronounced during deep sleep.