Impella Versus Selective Biatrial Canulation for Left Ventricular Unloading During Extracorporeal Membrane...

Area of Science:

• Cardiology
• Cardiovascular Surgery
• Critical Care Medicine

Background:

• Left ventricle (LV) overdistension during venoarterial (VA) extracorporeal membrane oxygenation (ECMO) is a significant clinical challenge.
• Effective LV unloading strategies are crucial for improving outcomes in patients on VA-ECMO.

Purpose of the Study:

• To compare the efficacy and safety of two LV unloading techniques during VA-ECMO: selective biatrial extracorporeal membrane oxygenation (SBA-ECMO) versus Impella CP/5.0 in combination with ECMO (ECPELLA).

Main Methods:

• A retrospective study of consecutive adult patients receiving VA-ECMO with LV unloading between January 2014 and March 2023.
• Primary endpoint: ventilation-free days. Secondary endpoints: serious bleeding, blood product consumption, thrombotic complications, and 28-day mortality.

Main Results:

• SBA-ECMO was associated with significantly lower rates of serious bleeding (HR 0.31) and reduced blood product consumption (RR 0.57) compared to ECPELLA.
• No significant differences were observed in ventilation-free days (10 vs. 5 days, p=0.61), thrombotic complications, or 28-day mortality between the groups.

Conclusions:

• In patients experiencing LV congestion during VA-ECMO, SBA-ECMO offers a potential advantage by reducing bleeding and transfusion requirements compared to ECPELLA.
• Both SBA-ECMO and ECPELLA demonstrate similar impacts on ventilation-free days, thrombotic complications, and mortality.