A nationwide analysis of patients with Takotsubo cardiomyopathy-related cardiogenic shock (TTC-CS) published in American Heart Journal Plus - Cardiology and Practice reveals that extracorporeal membrane oxygenation (ECMO) use is associated with significantly higher mortality and complications compared to Impella, a short-term percutaneous left ventricular assist device (LVAD), especially when left ventricular (LV) unloading is not provided.
The study, using the National Readmission Database from 2016 to 2020, included 2,025 hospitalizations involving mechanical circulatory support (MCS) for total cardiac support (TTC-CS). Of these, 1,790 received Impella, while 235 were managed with ECMO. ECMO was more frequently used in metropolitan teaching hospitals (72.2% vs. 56.1%, p < 0.05). In-hospital mortality was nearly twice as high in the ECMO group (38.9% vs. 20.6%, p < 0.001). Major bleeding (15.3% vs. 2.3%) and acute blood loss anemia (48.9% vs. 19.1%) were also more frequent with ECMO.
In a subgroup analysis, the addition of LV unloading (via Impella or intra-aortic balloon pump [IABP]) to ECMO helped reduce the mortality gap compared to Impella alone (42.2% vs. 33.3%, p = 0.384). However, ECMO patients still experienced higher rates of bleeding complications.
These findings suggest that while ECMO can be life-saving, its use in TTC-CS should be strategically combined with LV unloading.
• The study analyzed 2,025 TTC-CS patients needing mechanical circulatory support.
• ECMO was used in 235 patients and Impella in 1,790.
• ECMO was more often used in metropolitan teaching hospitals. After matching, ECMO had higher in-hospital mortality (38.9% vs. 20.6%).
• ECMO patients had significantly more bleeding, blood loss, and anemia.
• When ECMO was combined with LV unloading, mortality was comparable to Impella. However, bleeding risks remained higher with ECMO, even with unloading.
• Impella demonstrated a safer profile for TTC-CS, particularly in the absence of left ventricular (LV) unloading.
Ali S, Kumar M, Khlidj Y, et al. Trends and outcomes of different mechanical circulatory support modalities for refractory cardiogenic shock in Takotsubo cardiomyopathy. Am Heart J Plus. 2025;54:100545. Published 2025 Apr 14. doi:10.1016/j.ahjo.2025.100545
Extracorporeal membrane oxygenation (ECMO) use is associated with significantly higher mortality and complications compared to Impella, a short-term percutaneous left ventricular assist device (LVAD), especially when left ventricular (LV) unloading is not provided.