Cardiogenic shock prognosis according to the type of infarction: STEMI vs non-STEMI. Acute-phase and 5-year mortality

Funding Acknowledgements Type of funding sources: Public hospital(s). Main funding source(s): Hospital Germans Trias i Pujol Background Cardiogenic shock (CS) is a severe complication of myocardial infarction (MI) and carries a high mortality. Clinical profile and prognosis of these patients could differ depending on the electrocardiographic pattern at admission. The objective of this study is to demonstrate these differences. Methods Prospective register of patients with MI complicated with CS admitted to the acute cardiac care unit of a tertiary hospital between 2010 and 2019. Clinical characteristics and mortality at 30-day and 5-year were compared according to the presence (STEMI) or absence (NSTEMI) of ST-segment elevation. Results This study included 239 patients, 79.5% had STEMI and 20.5% had NSTEMI. There were no differences in age (69 vs. 71 years, p=0.330), gender distribution (22.4% vs. 27.4% women, p=0.486) and ejection fraction (33% vs. 30%, p=0.231). However, patients with STEMI had more extensive MI (CK-MB peak 279 vs. 85 ng/ml, p STEMI patients had higher 30-day mortality (59.5% vs 36.7%; p=0.004), but this difference progressively diminished. As a result, 5-year survival had no significant differences. After adjusting for main clinical predictors, STEMI was independently associated with 30-day mortality (HR 1.99), but this association disappeared when the follow-up was extended to 5 years. Conclusions Patients with CS and STEMI had more extensive infarcts and with more mechanical complications than NSTEMI. Patients with NSTEMI and CS had more cardiovascular risk factors, previous coronary artery disease, and multi-vessel involvement. 30-day mortality of STEMI with CS was higher than in NSTEMI, although 5-year mortality did not offer significant differences.