Evaluation of cardiovascular autonomic modulation during isometric wall squat in subjects after myocardial or percutaneous revascularization
DOI:
https://doi.org/10.47197/retos.v69.115349Keywords:
Acute coronary syndrome, autonomic nervous system, isometric exercise, myocardial revascularizationAbstract
Introduction: Cardiovascular autonomic modulation reflects the interaction between the autonomic nervous system and the cardiovascular system. It can be assessed through heart rate variability (HRV), a key marker of cardiovascular health; low HRV indicates reduced adaptive capacity.
Objective: To compare HRV at rest and during exercise in people post myocardial revascularization (RVM) and percutaneous transluminal coronary angioplasty (PTCA).
Method: An analytical cross-sectional study was conducted with 37 participants. HRV was assessed using electrocardiogram recordings first in the supine position for 10 minutes, then during a 2-minute wall sit isometric exercise (SIP).
Results: The average age was 64.6±9.3 years. The RR interval significantly decreased (p<0.001) during the SIP, indicating increased sympathetic activation. However, no statistically significant differences were found in LF (low frequency), HF (high frequency), or the LF/HF ratio between rest and exercise.
Discussion: A reduction in HRV during the SIP was observed, consistent with Brockmann et al. (2023), who reported a progressive decline in HRV with increased exercise intensity on a treadmill. Unlike previous studies that used handgrip tests (Leite et al., 2010), this study employed a 2-minute SIP protocol, demonstrating its potential as a tool for assessing autonomic modulation during static exertion in cardiovascular populations.
Conclusion: The wall sit isometric exercise appears to be a safe, accessible, and valuable method for evaluating autonomic modulation during exercise in people with post-revascularization procedures.
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