Use of intra-aortic balloon pump in cardiac surgery: analysis of 80 consecutive cases

Abstract

Background:The low cardiac output syndrome in perioperative period of cardiac surgery may occur in about 10 to 15% of patients; of this total, 2% require mechanical support for adequate hemodynamic control.Objective: This study aimed to describe the mortality of patients requiring intra-aortic balloon pump (IABP) in transor post-cardiac surgery, identifying preoperative variables associated with a worse outcome, as well as describe the postoperative complications and survival in the medium term. Patients and Methods: retrospective cohort study including 80 consecutive cases between January/2009 and September/ 2011. The patients had on average 62.9 ± 11.3 years and 58.8% were male. In the sample, 81.3% were hypertensive, 50% had previous myocardial infarction and 38.8% heart failure NYHA III/IV. The most common surgery performed was isolated coronary artery bypass grafting (37.5%).Results: Hospital mortality was 53.8% (95% HF: 42.7-64.9) and the cross-clamp time >90 minutes was an independent predictor of mortality in multivariate analysis (RR 1.52 95% HF: 1.04-2.22). Regarding complications, 71.3% (95% HF: 61.2 to 81.4) of patients had at least one additional complication: the lower limb ischemia was observed in 5.0% of patients. The 1-year survival was 43.6%, observing a plateau in the survival rate after an initial sharp drop, related to hospital mortality.Conclusion: Patients who need the IABP form a group of very high risk for morbidity and mortality. Its use, however, allows many patients to recover an evolution that was invariably fatal, having the patients discharged home a good survival in the medium term.Descriptors: Intra-aortic balloon pumping. Cardiac surgical procedures. Cardiac output, low. ResumoFundamento: A síndrome de baixo débito cardíaco no perioperatório de cirurgia cardíaca pode incidir em cerca de 10 a 15% dos pacientes; desse total, 2% necessitam de suporte mecânico para adequado controle hemodinâmico.Objetivos: Descrever a mortalidade de pacientes que necessitaram utilizar balão intra-aórtico (BIAo) no trans ou pós-operatório de cirurgia cardíaca, identificando variáveis pré-operatórias associadas a pior desfecho, assim como descrever as complicações pós-operatórias e a sobrevida em médio prazo. Rev Bras Cir Cardiovasc 2012;27(2):251-9