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Postoperative antiarrhythmic effects of diltiazem in patients undergoing coronary bypass grafting
1Department of Thoracic and Cardiovascular Surgery, University of Frankfurt am Main, Germany.
Insights
Diltiazem significantly reduced ventricular arrhythmias in patients after coronary bypass grafting compared to nitroglycerin. This calcium channel antagonist is recommended for preventing cardiac arrhythmias during heart surgery.
Area of Science:
- Cardiology
- Cardiac Surgery
- Pharmacology
Background:
- Cardiac arrhythmias are common post-coronary bypass grafting (CABG).
- Hemodynamic instability often results from these arrhythmias.
- Effective antiarrhythmic strategies are crucial in the perioperative period.
Purpose of the Study:
- To evaluate the antiarrhythmic efficacy of diltiazem.
- To compare diltiazem with nitroglycerin in CABG patients.
- To assess the impact on postoperative cardiac arrhythmias.
Main Methods:
- Randomized trial involving 40 CABG patients.
- Patients received either diltiazem or nitroglycerin.
- Hemodynamic monitoring via Swan-Ganz catheter and ECG analysis.
Main Results:
- Diltiazem group showed significantly fewer ventricular arrhythmias (Lown class IV).
- Supraventricular tachycardias were more frequent in the nitroglycerin group.
- Statistical significance was observed at p < 0.05.
Conclusions:
- Diltiazem demonstrates superior antiarrhythmic effects in CABG patients.
- It is recommended as a standard perioperative medication.
- Diltiazem aids in managing cardiac arrhythmias post-heart surgery.
Abstract:
Hemodynamic problems resulting from cardiac arrhythmias often occur in patients undergoing coronary bypass grafting in the early postoperative period. Therefore, in this study the antiarrhythmic effects of the calcium channel antagonist diltiazem were evaluated in coronary bypass grafting. Forty patients were randomly assigned either to a therapy with diltiazem or nitroglycerin. Hemodynamic measurements were established by Swan-Ganz catheter, and long-term ECG analyses were performed preoperatively and 1, 3 and 5 days after operation. There were significantly fewer ventricular arrhythmias (Lown class IV) in the diltiazem groups than in the nitroglycerin groups (p < 0.05). Supraventricular tachycardias were significantly more often observed in the nitroglycerin groups on all 3 days (p < 0.05). As a result, the calcium channel antagonist diltiazem is recommended as a standard adjunct to perioperative medication in cardiac surgery.