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Developing a Prediction Model for Persistent Systolic Anterior Motion After Mitral Valve Repair
Mitsuhiro Yano1, Masanori Nishimura1, Atsuko Yokota1
1Department of Cardiovascular Surgery, Miyazaki Medical Association Hospital, Miyazaki, Japan.
Annals of Thoracic Surgery Short Reports
|January 10, 2025
Summary
The distance from the anterior leaflet tip to the interventricular septum predicts systolic anterior motion (SAM) after mitral valve repair. This finding aids in developing a new prediction model for SAM.
Area of Science:
- Cardiovascular Surgery
- Cardiac Imaging
- Predictive Modeling
Background:
- Systolic anterior motion (SAM) is a potential complication following mitral valve repair.
- Identifying predictors for SAM is crucial for improving surgical outcomes.
- The distance between the anterior leaflet tip and interventricular septum is a novel area of investigation.
Purpose of the Study:
- To investigate the distance between the anterior leaflet tip and interventricular septum as a predictor of SAM post-mitral valve repair.
- To develop and validate a prediction model for persistent SAM.
Main Methods:
- A case-control study included 139 patients undergoing mitral valve repair for degenerative mitral regurgitation.
- Multivariable logistic regression analysis was used to identify predictors of persistent SAM.
- A prediction model incorporating leaflet-septum distance and body surface area was developed and assessed.
Main Results:
- The incidence of persistent SAM was 5.8%.
- The distance between the anterior leaflet tip and interventricular septum was significantly associated with persistent SAM.
- The prediction model demonstrated high accuracy (concordance index of 0.934) and good calibration.
Conclusions:
- The distance between the anterior leaflet tip and interventricular septum is a significant predictor of persistent SAM.
- A prediction model combining leaflet-septum distance and body surface area can effectively predict persistent SAM.
- This model offers clinical utility in assessing SAM risk after mitral valve repair.
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