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Ventricular arrhythmia before and after aorto-coronary bypass surgery
Insights
Aorto-coronary bypass surgery (ACBS) does not significantly alter the prevalence of premature ventricular contractions (PVCs) or prevent complex PVCs in patients undergoing the procedure for angina relief.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Background:
- Ventricular arrhythmia, including premature ventricular contractions (PVCs), is a common concern in patients with coronary artery disease.
- Aorto-coronary bypass surgery (ACBS) is a primary intervention for relieving angina symptoms.
Purpose of the Study:
- To investigate the impact of ACBS on the incidence and complexity of ventricular arrhythmias.
- To determine if ACBS influences the prevalence of premature ventricular contractions (PVCs).
Main Methods:
- Prospective study involving 57 patients undergoing ACBS.
- Six-hour Holter monitoring performed preoperatively and 3 months post-ACBS.
- Patients were not on antiarrhythmic drugs during monitoring.
Main Results:
- No significant change in the number of patients across arrhythmia severity groups (based on PVCs per hour) post-ACBS.
- The incidence of complex PVCs remained similar, with 8 patients preoperatively and 9 postoperatively.
- Preoperative factors like diseased vessels and left ventricular wall motion abnormality did not correlate with post-ACBS ventricular arrhythmia.
Conclusions:
- ACBS for angina relief does not significantly affect the overall prevalence of PVCs.
- The surgery does not appear to prevent or reduce the occurrence of complex ventricular arrhythmias.
- Further research may be needed to explore alternative strategies for managing ventricular arrhythmias in this patient population.
Abstract:
The influence of aorto-coronary bypass surgery (ACBS) on ventricular arrhythmia was examined in 57 patients. Six-hour Holter monitoring was done on the day prior to and 3 mth after ACBS. None of the patients were on any antiarrhythmic drugs during these recordings. Ventricular arrhythmia was classified into three groups: Group I (45 patients) had an average of less than 10 premature ventricular contractions (PVCs) per hour, Group II (7 patients), 11-30 PVCs per hour and Group III (5 patients), greater than 30 PVCs per hour. There was no significant change in the number of patients in each group after ACBS. Complex PVCs were present in 8 patients preoperatively and in 9 patients after ACBS. The number of diseased vessels and the extent of left ventricular wall motion abnormality noted preoperatively, had no effect on ventricular arrhythmia following surgery. These data show that ACBS, when performed to relieve angina, does not have a significant effect on the prevalence of PVCs and does not prevent or reduce the occurrence of complex PVCs.