Impact of Impella5.0/5.5 use on short-term prognosis in patients with AMI-related cardiogenic shock receiving Impella-incorporated MCS in Japan

Abstract Background The short-term prognosis in patients with acute myocardial infarction-related cardiogenic shock (AMI-CS) remains unsatisfactory even in the era of Impella. The survival benefit of Impella 5.0/5.5 use remains uncertain. Purpose This study examined the clinical impact of Impella device type on clinical outcomes among patients with AMI-CS receiving Impella support using the prospective multi-center J-PVAD registry data. Methods We included patients with AMI-CS who received Impella-incorporated temporary MCS and were enrolled in the J-PVAD registry between Feb 2022 and Dec 2023. The primary outcome was 30-day survival. Results A total of 2405 patients (average 71 y; LVEF 30%; Lac 5.6 mmol/L) were included. 1409 (58.6%) patients received Impella alone and the others (41.4%) received ECPELLA support. Patients who received ECPELLA had a lower 30-day survival compared to those receiving Impella alone (46.1% vs 62.3%, p < 0.0001). Of note, patients who received ECMO with Impella5.0/5.5 had a greater survival compared to those who received ECMO with Impella2.5/CP (64.4% vs 43.0%, Figure 1). Conclusions Patients who received ECPELLA had a lower 30-day survival compared to Impella alone. Impella 5.0/5.5 use may improve prognosis for those with ECMO support in AMI-CS.