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Significant Mitral Regurgitation After Permanent Right Ventricular Pacemaker Implantation: Prognostic Implications
Takeru Nabeta1, Xavier Galloo1, Laurens Tops1
1Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands.
The American Journal of Cardiology
|May 9, 2024
Summary
Mitral regurgitation (MR) affects nearly one-third of patients after right ventricular (RV) pacemaker (PM) implantation. This condition independently predicts adverse cardiac events, including mortality and heart failure hospitalization.
Area of Science:
- Cardiology
- Cardiac Electrophysiology
- Cardiovascular Imaging
Background:
- Mitral regurgitation (MR) development post-right ventricular (RV) pacemaker (PM) implantation is not fully understood.
- The prognostic implications of MR following RV pacing require further investigation.
Purpose of the Study:
- To determine the prevalence of significant MR after de novo RV PM implantation.
- To identify clinical variables associated with MR development post-PM.
- To evaluate the association between significant MR and cardiac outcomes.
Main Methods:
- Retrospective analysis of 451 patients undergoing de novo RV PM implantation.
- Assessment of MR prevalence and severity at baseline and post-implant.
- Multivariate logistic and Cox regression analyses to identify predictors and outcomes.
Main Results:
- Significant MR (≥moderate) developed in 29% of patients at a median of 2.4 years post-implantation.
- Single-chamber PM, elevated left ventricular end-systolic volume index, and baseline mild MR predicted significant MR.
- Significant MR was independently associated with adverse cardiac events (mortality or heart failure hospitalization).
Conclusions:
- Approximately one-third of patients develop significant MR after RV PM implantation.
- Significant MR is an independent predictor of adverse cardiac events in this population.
- Further research into mechanisms and management strategies for MR post-PM is warranted.
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