Comparison of hospital mortality with intra-aortic balloon counterpulsation insertion before vs after primary percutaneous coronary intervention for cardiogenic shock complicating acute myocardial infarction

Abstract

Primary percutaneous coronary intervention (PCI) and intra-aortic balloon pump counterpulsation (IABP) are established treatment modalities in acute myocardial infarction complicated by cardiogenic shock. We hypothesized that the insertion of the IABP before primary PCI might result in better survival of patients with cardiogenic shock compared with postponing the insertion until after primary PCI. We, therefore, retrospectively studied 48 patients who had undergone primary PCI with IABP because of cardiogenic shock complicating acute myocardial infarction (26 patients received the IABP before and 22 patients after primary PCI). No significant differences were present in the baseline clinical characteristics between the 2 groups. The mean number of diseased vessels was greater in the group of patients treated with the IABP before primary PCI (2.8±0.5 vs 2.3±0.7, P=012), but the difference in the number of treated vessels was not significant. The peak creatine kinase and creatine kinase-MB levels were lower in patients treated with the IABP before primary PCI (median, 1077; interquartile range, 438-2067 vs median, 3299; interquartile range, 695-6834; P=047 and median, 95; interquartile range, 34-196 vs median, 192; interquartile range, 82-467; P=048, respectively). In-hospital mortality and the overall incidence of major adverse cardiac and cerebrovascular events were significantly lower in the group of patients receiving the IABP before primary PCI (19% vs 59% and 23% vs 77%, P=007 and P=0004, respectively). Multivariate analysis identified renal failure (odds ratio, 15.2; 95% confidence interval, 3.13-73.66) and insertion of the IABP after PCI (odds ratio, 5.2; 95% confidence interval, 1.09-24.76) as the only independent predictors of in-hospital mortality. In conclusion, the results of the present study suggest that patients with cardiogenic shock complicating acute myocardial infarction who undergo primary PCI assisted by IABP have a more favorable in-hospital outcome and lower in-hospital mortality than patients who receive IABP after PCI. Abdel-Wahab M, Saad M, Kynast J, et al. Comparison of hospital mortality with intra-aortic balloon counterpulsation insertion before versus after primary percutaneous coronary intervention for cardiogenic shock complicating acute myocardial infarction. Am J Cardiol. 2010;105:967-971. © 2010 Wiley Periodicals, Inc.