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30-day survival after propensity score matching. AMI, acute myocardial infarction; CI, confidence interval; CS, cardiogenic shock; HR, hazard ratio; OHCA, out-of-hospital cardiac arrest; rCS, refractory cardiogenic shock. (A) Kaplan–Meier curves of AMI–rCS after OHCA with or without active left ventricular unloading by Impella, *p < 0.05. (B) Kaplan–Meier curves of AMI–rCS patients after OHCA without CS or with AMI–rCS supported by Impella.
