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The effect of coronary revascularization on exercise-induced ventricular ectopic activity
L C Anastassiades1, A G Antonopoulos, A A Petsas
1Cardiovascular Diagnostic Centre, Nicosia, Cyprus.
European Heart Journal
|August 1, 1987
Summary
Coronary artery bypass graft surgery (CABGS) did not significantly alter exercise-induced ventricular ectopic activity. However, new ventricular ectopy emerged post-CABGS in some patients, particularly those with prior myocardial infarction.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Background:
- Exercise-induced ventricular ectopic activity is a concern in patients with coronary artery disease.
- Coronary artery bypass graft surgery (CABGS) aims to improve cardiac function and reduce ischemic events.
Purpose of the Study:
- To investigate the impact of CABGS on the occurrence of exercise-induced ventricular ectopic activity.
- To assess changes in ventricular ectopy before and after successful revascularization.
Main Methods:
- Prospective study involving 43 patients undergoing CABGS.
- Treadmill exercise tests (TET) performed pre-surgery and three months post-surgery.
- Analysis of premature ventricular contractions (PVCs) and hemodynamic parameters during TET.
Main Results:
- The prevalence of exercise-induced PVCs was similar pre- and post-CABGS (20.9% vs. 27.9%).
- Seven patients (16.3%) developed new-onset PVCs after surgery, with prior myocardial infarction being a significant factor.
- Significant improvements were observed in TET duration, double product, and cardiorespiratory fitness post-CABGS.
Conclusions:
- Successful CABGS does not significantly affect exercise-induced ventricular ectopic activity in patients with coronary artery disease.
- New-onset ventricular ectopy post-CABGS can occur, especially in patients with a history of myocardial infarction.
- While revascularization improves exercise capacity, it does not eliminate exercise-induced arrhythmias in all patients.
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