Long-term requirement for pacemaker implantation after cardiac valve replacement surgery

Area of Science:

• Cardiovascular Surgery
• Cardiac Electrophysiology
• Medical Device Implantation

Background:

• The immediate risk of permanent pacemaker implantation (PPI) post-cardiac valve replacement is recognized, but long-term risks remain uncertain.
• Understanding long-term PPI trends is crucial for patient management and surgical decision-making.

Purpose of the Study:

• To investigate the cumulative incidence and timing of permanent pacemaker implantation (PPI) following various cardiac valve replacement procedures.
• To compare PPI rates across different valve replacement types and with coronary artery bypass surgery.

Main Methods:

• A large-scale retrospective study comparing PPI rates in patients undergoing aortic valve replacement (AVR), mitral valve replacement (MVR), combined AVR+MVR, AVR+MVR+tricuspid valve replacement (TVR), and coronary artery bypass grafting (CABG).
• Analysis of PPI rates over a 14-year period, utilizing hazard ratios and confidence intervals to assess risk independent of confounders.
• Identification of patient-specific predictors for PPI.

Main Results:

• Cardiac valve replacement surgery was associated with significantly higher cumulative PPI rates (3.07-7.6 times) compared to CABG alone.
• PPI risk increased with the number of valves replaced, with higher risks observed after AVR compared to MVR.
• Long-term PPI hazard rates increased substantially up to 10 years post-surgery for all valve replacement groups, particularly for dual and triple valve replacements.
• Independent predictors of PPI included advanced age, male sex, emergency admission, and pre-existing conditions like diabetes mellitus, renal impairment, and heart failure.

Conclusions:

• Cardiac valve replacement surgery is linked to a sustained long-term risk of permanent pacemaker implantation.
• The risk of PPI is notably elevated following dual and triple valve replacement procedures.
• Patient characteristics such as age, sex, emergency admission status, and comorbidities significantly predict the likelihood of requiring a permanent pacemaker.