Analysis on application timing of IABP in emergency PCI treatment of patients with combined acute myocardial infarction and cardiac shock

M. Zhou, K. Yu, X.-H. Wang, C.-S. Yang, Y.-P. Lei, Y.-G. Wang, Y.-Z. Xue, H.-C. Yao, B. Gao

Department of Cardiology of Liaocheng People’ Hospital, Donghangxi Road, Liaocheng, China. yaohc66@126.com

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• Cardiology

OBJECTIVE: To study the application timing and effect of intra-aortic balloon pump (IABP) in the emergency PCI treatment of patients with combined acute myocardial infarction (AMI) and cardiogenic shock (CS).

PATIENTS AND METHODS: 84 cases of patients with combined AMI and CS under PCI in emergency treatment were randomly divided into the control group (n=42) and observational group (n=42). The control group underwent IABP again, after the invalidation of internal medicine drug treatment, while the observational group underwent IABP before the operation. We compared the effects of treatment.

RESULTS: After the intervention, the averages of arterial pressure and urine volume were increased in both groups than before (p <0.05). The average of heart rate was decreased, and the improvement in the observational group was more significant (p <0.05). However, the mortality rate in the observational group during the perioperative period was decreased than the control group as well as, the success rate of off-respirator was significant (p <0.05). The comparison of IABP complication occurrence rate as well as the survival rate after 1-year follow-up between both groups was not significantly different. Additionally, whereas the NYHA grouping in two groups was gradually improved, the difference was not statistically significant between both groups. However, in the observational group, the LVEF after one-month follow-up was significantly higher than in the control group (p <0.05), but not when comparing 1-year. VEDd at each time point in two groups were also similar.

CONCLUSIONS: The early IABP can improve hemodynamics of patients with combined AMI and CS under emergency PCI. It can reduce perioperative mortality rate, improve the success rate of off-respirator, but cannot increase IABP complication incidence rate while having little influence on the long-term survival rate and cardiac function indicator.

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