Left ventricle unloading strategies in ECMO: A single-center experience

Area of Science:

• Cardiology
• Critical Care Medicine
• Cardiovascular Surgery

Background:

• Extracorporeal membrane oxygenation (ECMO) is vital for perfusion but carries risks.
• ECMO increases cardiac afterload, potentially impairing left ventricular (LV) recovery.
• Optimal strategies for LV unloading during ECMO are not well-established.

Purpose of the Study:

• To evaluate the association between LV unloading strategies and patient outcomes during ECMO.
• To compare reactive versus immediate LV unloading approaches.
• To compare the efficacy of Impella CP versus intra-aortic balloon pump (IABP) for LV unloading.

Main Methods:

• Retrospective review of ECMO patient outcomes from September 2015 to January 2019.
• Comparison of outcomes between reactive (Group 1) and immediate (Group 2) LV unloading.
• Analysis of survival and ECMO-related complications for Impella CP versus IABP unloading.

Main Results:

• Similar survival rates between reactive and immediate unloading groups (33% vs. 42%).
• Higher rates of clinically significant hemorrhage in the immediate unloading group (67% vs. 40%).
• Comparable survival and complications between Impella CP and IABP, with Impella showing higher-than-predicted survival.

Conclusions:

• Reactive LV unloading is a feasible strategy during ECMO.
• Venting with Impella CP may lead to better-than-anticipated survival rates.
• Findings support further research into clinical guidelines for LV unloading in ECMO patients.