Background
Mechanical circulatory support in cardiogenic shock (CS) with percutaneous left ventricular assist devices (PVADs) has expanded rapidly, but there is a paucity of Canadian data. Conflicting observational reports have emerged regarding the benefit of PVADs in CS. We describe a 5-year experience with Impella CP for CS at a single Canadian tertiary care centre.
Methods
Consecutive adult patients with CS supported with Impella CP were included. Comprehensive clinical data and outcomes were retrospectively assessed. We evaluated patient characteristics, patterns of care, in-hospital outcomes, 6-month survival, and predictors of survival.
Results
Thirty-four patients were supported with Impella CP for CS over 5 years. A majority had acute myocardial infarction (94%) with advanced CS (68% Society for Cardiovascular Angiography and Intervention [SCAI] stage D or E). Survival to discharge was 58%. In patients who survived to discharge, 6-month survival was 100% with excellent functional status. SCAI CS stage and initial serum lactate showed significant associations with survival. There was also a trend towards improved survival with shorter door-to-PVAD time. Clinically significant bleeding was common (26%), and 3 patients had device-related vascular complications.
Conclusion
Impella CP may have a role in carefully selected patients with CS. The SCAI shock classification and serum lactate may facilitate patient selection, and minimizing door-to-support time as well as bleeding complications are important considerations. Further clinical investigations, particularly in a Canadian setting, will be necessary to establish the role of this new technology in CS.