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Permanent pacemaker implantation following cardiac surgery: indications and long-term follow-up
Ofer Merin1, Michael Ilan, Avraham Oren
1Department of Cardiothoracic Surgery, Shaare Zedek Medical Center, Jerusalem, Israel.
Insights
Heart surgery patients needing pacemakers often have conduction issues. Left bundle branch block and aortic valve replacement predict pacemaker need, with some patients recovering function later.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Background:
- 1.4% of patients require permanent pacemaker implantation after heart surgery.
- Early pacemaker implantation may reduce patient morbidity and hospital stay.
- Identifying predictors for pacemaker dependence is crucial for patient management.
Purpose of the Study:
- To identify predictors of permanent pacemaker requirement after cardiac surgery.
- To determine factors associated with late pacemaker dependency.
- To inform optimal timing for pacemaker implantation in high-risk patients.
Main Methods:
- Retrospective review of 4,999 patients undergoing cardiac surgery (1993-2005).
- Analysis of patient demographics, surgical procedures, and pacemaker implantation data.
- Multivariate analysis to identify predictors for pacemaker requirement and dependency.
Main Results:
- 72 patients (1.4%) required pacemaker implantation.
- Left bundle branch block and aortic valve replacement were significant predictors for pacemaker requirement (P < 0.001).
- Of patients followed up, 63% were pacemaker dependent, with predictors including third-degree atrioventricular block and preoperative left bundle branch block.
Conclusions:
- Patients with pre-existing conduction disturbances and those undergoing aortic valve replacement are at high risk for pacemaker implantation.
- Approximately one-third of patients requiring a pacemaker may recover conduction over time.
- Recommend early pacemaker implantation (5 days post-surgery) for high-risk, pacemaker-dependent patients to facilitate mobilization and discharge.
Background:
Conduction disturbances requiring permanent pacemaker implantation after heart surgery occur in about 1.5% of patients. Early pacemaker implantation may reduce morbidity and postoperative hospital stay. We reviewed our experience with patients undergoing surgery to try and identify predictors for pacemaker requirements and patients who will remain pacemaker dependent.
Methods:
We performed a retrospective review of 4,999 patients undergoing surgery between the years 1993 and 2005. Patient age was 64 +/- 12 years, and 71% were males. Coronary bypass was performed in 4,071 (81%), aortic valve replacement in 675 (14%), and mitral valve replacement in 968 (18%) patients.
Results:
Seventy-two patients (1.4%) required implantation of a permanent pacemaker after surgery. Indications for pacemaker implantation included complete atrioventricular block in 59, symptomatic bradycardia/slow atrial fibrillation in nine, second-degree atrioventricular block in two, and other conduction disturbances in two patients. Predictors for pacemaker requirement by multivariate analysis were left bundle branch block and aortic valve replacement (P < 0.001). Late follow-up was available in 58 patients, at 72 +/- 32 months. Thirty-seven (63%) were pacemaker dependent. Predictors for late pacemaker dependency were third-degree atrioventricular block after surgery and preoperative left bundle branch block (P < 0.001).
Conclusions:
Patients at high risk for pacemaker implantation after heart surgery include those with preexisting conduction disturbances, and those undergoing aortic valve replacement. Of those receiving a pacemaker, about one-third will recover at late follow-up. For patients in the high-risk group who are pacemaker dependent after surgery, we recommend implanting a permanent pacemaker at 5 days after surgery, thus enabling early mobilization and early discharge.
