Key result
Coronary artery bypass grafting attenuated heart rate responses to deep breathing and Valsalva maneuvers, but values mostly remained within normal ranges, indicating limited clinical significance.
Why the study?
Does coronary artery bypass grafting affect autonomic cardiovascular reflexes in patients with coronary artery disease?
Population
15 patients with coronary artery disease without previous myocardial infarction
Comparison
Coronary artery bypass grafting (CABG) vs Pre-operative baseline
Design
Cohort
Authors
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No routine change to post-CABG autonomic assessment; hypothesis-generating for localized perioperative effects.
Observational (n=15)
Does coronary artery bypass grafting affect autonomic cardiovascular reflexes in patients with coronary artery disease?
CABG attenuates heart rate responses to autonomic reflex tests, likely due to local perioperative damage, but this effect appears to have little clinical significance as responses remain mostly within normal ranges.
Piha et al. (1994) conducted an observational in Coronary artery disease (n=15). Coronary artery bypass grafting (CABG) vs. Pre-operative baseline was evaluated on Heart rate responses to deep breathing test and Valsalva manoeuvre, blood pressure responses, and pupillometric variables. Coronary artery bypass grafting attenuated heart rate responses to deep breathing and Valsalva maneuvers, but values mostly remained within normal ranges, indicating limited clinical significance.
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