Why the study?
Cardiovascular events and arrhythmias may occur after CABG, and cardiac arrhythmias correlate with heart rate variability, but the temporal pattern of HRV changes after surgery was not established.
Does CABG alter heart rate variability over a 6-month follow-up period in patients with stable CAD?
Population
119 consecutive patients with stable CAD undergoing CABG
Comparison
Postoperative time points (1 week, 3 months, 6 months) vs preoperative baseline
Design
Prospective cohort study
Follow-up
6 months
Authors
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Post-CABG HRV decline may flag transient arrhythmia vulnerability; leaves open whether serial monitoring improves outcomes.
Does CABG alter heart rate variability over a 6-month follow-up period in patients with stable CAD?
Heart rate variability decreases acutely 7 days after CABG but recovers and improves beyond preoperative levels by 6 months, suggesting long-term improvement in autonomic nervous system function and reperfusion.
Ngo et al. (2022) studied this question.
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