Clinical Factors Associated with In-Hospital Mortality in Patients with Acute Myocardial Infarction Who Required Intra-Aortic Balloon Pumping.

Recent guidelines do not recommend the routine use of intra-aortic balloon pumping (IABP) for patients with cardiogenic shock. However, IABP support is still selected for acute myocardial infarction (AMI) in clinical practice because an Impella device did not show superiority over IABP and the mortality of AMI with cardiogenic shock is still high. This study aimed to find factors associated with in-hospital mortality in patients with AMI who required IABP support. Overall, 104 patients with AMI who required IABP support were included as the study population. Of 104 patients, in-hospital death was observed in 19 (18.3%). Multivariate stepwise logistic regression analysis was performed to investigate the determinants of in-hospital death. Shock, resuscitation, estimated glomerular filtration rate (eGFR), pre-systolic blood pressure of IABP insertion, multi-vessel disease, fluoroscopy time, initial lactic acid dehydrogenase levels, and timing of IABP support were included as independent variables. Shock (OR 25.27, 95% CI 3.26-196.11, P = 0.002) was significantly associated with in-hospital death after controlling other covariates, whereas eGFR (every 10 mL/minute/1.73 m increase: OR 0.65, 95% CI 0.51-0.82, P < 0.001) and pre-percutaneous coronary intervention (pre-PCI) insertion of IABP (versus on-PCI insertion of IABP: OR 0.06, 95% CI 0.008-0.485, P = 0.008) were inversely associated with in-hospital death. In conclusion, shock was significantly associated with in-hospital death, whereas eGFR and pre-PCI insertion of IABP were inversely associated with in-hospital death in patients with AMI who received IABP support. Pre-PCI insertion of an IABP catheter might be associated with better survival in AMI patients who potentially require IABP support.