Ventricular arrhythmias in chronic stable angina pectoris with surgical or medical treatment

Area of Science:

• Cardiology
• Cardiac Surgery
• Pharmacology

Background:

• Coronary artery disease (CAD) management involves medical therapy (e.g., propranolol) and surgical interventions (e.g., saphenous vein bypass grafting).
• Ventricular arrhythmias are a significant concern in patients with symptomatic CAD.

Purpose of the Study:

• To compare the prevalence of ventricular arrhythmias in patients with chronic stable angina treated with either propranolol or saphenous vein bypass grafting.
• To assess the impact of these treatments on survival rates and quality of life.

Main Methods:

• A study involving 130 patients with chronic stable angina pectoris, at least one year post-randomization to medical or surgical therapy.
• Six-hour dynamic electrocardiography was performed to evaluate arrhythmias.
• Medical patients primarily received propranolol, while surgical patients underwent saphenous vein grafting.

Main Results:

• No significant difference was observed in the overall prevalence of premature ventricular contractions between medical and surgical groups.
• A significantly higher prevalence of complex premature ventricular contractions was found in surgical patients not receiving propranolol compared to medical patients on propranolol (p < 0.05).
• Survival rates were similar between the groups, but quality of life was superior in surgical patients.

Conclusions:

• While overall ventricular arrhythmia prevalence is similar, complex arrhythmias are more common in surgical patients not on propranolol.
• Both treatment strategies offer comparable survival benefits.
• Saphenous vein bypass grafting may lead to a superior quality of life despite potential differences in complex arrhythmia prevalence.