Background: There are sparse clinical data on the procedural trends, outcomes and readmission rates following FDA approval and expansion of Transcatheter mitral valve repair/MitraClip®. Whether a complex new technology can be disseminated safely and quickly is controversial. Methods: The study cohort was derived from the National Readmission Data (NRD) 2013-14. MitraClip® was identified using appropriate International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) codes. The primary outcome was a composite of in-hospital mortality+procedural complications. Secondary outcome included 30-day readmissions. Hierarchical two level logistic models were used to evaluate study outcomes. Results: Our analysis included 2003 MitraClip® procedures. Overall in-hospital mortality was 3.9%. As expected, there was a significant increase in procedural volume post-FDA approval. Importantly, a corresponding downward trend in mortality and procedural complications was observed. Significant predictors of in-hospital mortality and procedural complications included the use of vasopressors (P <0.001) and hemodynamic support (P<0.001). Higher hospital volume (≥10 MitraClips/year) was associated with lower in-hospital mortality and complications (P=0.02). There were 304 (15.1%) 30-day readmissions, with heart failure being the most common cause of readmission. Elective procedures had lower in-hospital mortality (P<0.001) and lower readmission rates (P=0.011) compared with nonelective procedures. Conclusion: A significant increase in MitraClip® procedural volumes occurred post-FDA approval. Overall morbidity and mortality were low and trended downwards. Hospital procedure volume ≥10 cases were associated with lower mortality and overall complication rates. These data suggest a successful roll out of a very complex novel structural heart procedure.
- Hospital volume
- In hospital mortality
- Mitra clip
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Cardiology and Cardiovascular Medicine