Key result
Controlled breathing at 0.04 and 0.1 Hz significantly increased the energy of respiratory-linked oscillations in heart rate variability and photoplethysmography signals compared to 0.25 Hz (p<0.01).
Why the study?
The study was conducted to examine the characteristics of rhythmic processes and their relationships in different parts of the cardiovascular system recorded with non-invasive methods.
Does controlled breathing at specific frequencies alter the synchronization of cardiovascular oscillations in healthy volunteers?
Does controlled breathing at specific frequencies alter the synchronization of cardiovascular oscillations in healthy volunteers?
p-value: p=<0.01
Deep controlled breathing at low frequencies (0.04 and 0.1 Hz) significantly enhances the synchronization between respiratory, central, and peripheral cardiovascular oscillations in healthy humans.
May support slow breathing for autonomic research protocols; leaves open clinical relevance in cardiovascular care.
The human cardiovascular system is characterized by multi-level complex of regulatory structures with a large number of internal and external connections. In the functional aspect, the closest interaction is carried out between the cardiovascular and respiratory systems, where neurogenic regulatory mechanisms play an important role due to the activity of the sympathetic and parasympathetic parts of the autonomic nervous system. The aim of this work is to study the characteristics of rhythmic processes and their relationships in various parts of the cardiovascular system recorded using non-invasive methods (ECG, photoplethysmography and laser Doppler flowmetry). For signal processing, wavelet analysis is used.
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Мизева et al. (2021) studied Healthy volunteers (n=13). Controlled breathing at 0.04, 0.1, and 0.25 Hz vs. Spontaneous breathing was evaluated on Energy of respiratory-linked oscillations in heart rate variability (HRV) and photoplethysmography (PPG) signals (p=<0.01). Controlled breathing at 0.04 and 0.1 Hz significantly increased the energy of respiratory-linked oscillations in heart rate variability and photoplethysmography signals compared to 0.25 Hz (p<0.01).
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