ArticleEntropy (Basel, Switzerland)2023
Induced Relaxation Enhances the Cardiorespiratory Dynamics in COVID-19 Survivors.
Article in Entropy (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 5 citations in OpenAlex.
- Looking Back While Reading Ahead: Regressive Fixations and Temporal Anticipation in Music Sight-Reading.Journal of eye movement research · 2026Article
- Temporal Properties of Cardiorespiratory Coupling in Patients with Heart Failure During the Circadian Cycle.Entropy (Basel, Switzerland) · 2026Article
- Diabetes alters cardiorespiratory dynamics: insights from short-term recurrence quantification analysis of pulse-respiration quotient.Frontiers in physiology · 2025Article
- Coupling of anticipation and breathing in expert flute performance: the influence of musical structure and practice.Frontiers in cognition · 2024Article
- Changes in the autonomic cardiorespiratory activity in parturient women with severe and moderate features of preeclampsia.Frontiers in immunology · 2023Article
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
Most COVID-19 survivors report experiencing at least one persistent symptom after recovery, including sympathovagal imbalance. Relaxation techniques based on slow-paced breathing have proven to be beneficial for cardiovascular and respiratory dynamics in healthy subjects and patients with various diseases. Therefore, the present study aimed to explore the cardiorespiratory dynamics by linear and nonlinear analysis of photoplethysmographic and respiratory time series on COVID-19 survivors under a psychophysiological assessment that includes slow-paced breathing. We analyzed photoplethysmographic and respiratory signals of 49 COVID-19 survivors to assess breathing rate variability (BRV), pulse rate variability (PRV), and pulse-respiration quotient (PRQ) during a psychophysiological assessment. Additionally, a comorbidity-based analysis was conducted to evaluate group changes. Our results indicate that all BRV indices significantly differed when performing slow-paced breathing. Nonlinear parameters of PRV were more appropriate for identifying changes in breathing patterns than linear indices. Furthermore, the mean and standard deviation of PRQ exhibited a significant increase while sample and fuzzy entropies decreased during diaphragmatic breathing. Thus, our findings suggest that slow-paced breathing may improve the cardiorespiratory dynamics of COVID-19 survivors in the short term by enhancing cardiorespiratory coupling via increased vagal activity.
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