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INTRODUÇÃO: A cirurgia de revascularização do miocárdio muitas vezes é o tratamento de escolha de pacientes que sofrem angina instável. Não sabemos se essa condição acresce morbimortalidade nesse cenário. OBJETIVO: Comparar os desfechos dos pacientes submetidos a cirurgia de revascularização do miocárdio com quadro de angina instável com os pacientes submetidos a cirurgia de revascularização do miocárdio que não apresentaram angina instável. MÉTODOS: Coorte retrospectiva. A angina instável foi definida como síndrome coronariana aguda sem supradesnivelamento de ST e sem alteração enzimática e/ou angina classe IV. RESULTADOS: No período entre fevereiro de 1996 a julho de 2010, de 2.818 a cirurgia de revascularização do miocárdio isoladas realizadas, 1.016 (36,1%) pacientes apresentaram angina instável. A análise multivariada demonstrou que os pacientes com angina instável no pré-operatório utilizaram mais medicações como ácido acetilsalicílico, betabloqueador, heparina (anticoagulação plena), nitrato e menor necessidade de diureticoterapia, do que pacientes sem angina instável. Pacientes com angina instável utilizaram maior monitorização com Swan-Ganz e suporte com balão intra-aórtico do que os pacientes estáveis. Sobre os desfechos, necessitaram de maior tempo de internação (P=0,030) e apresentaram menor taxa de óbito (P=0,018) no pós-operatório de cirurgia de revascularização do miocárdio isolada. CONCLUSÃO: Submeter pacientes a cirurgia de revascularização do miocárdio isolada na vigência de síndrome coronariana aguda como angina instável não elevou a taxa de mortalidade. INTRODUCTION: Coronary artery bypass graft is often the treatment of choice for patients who suffer from unstable angina. We do not know whether this condition adds morbidity in this scenario. OBJECTIVE: To compare the outcomes of patients undergoing coronary artery bypass graft with unstable angina framework with patients who underwent coronary artery bypass graft showed no unstable angina. METHODS: Retrospective cohort study. Unstable angina was defined as acute coronary syndrome without ST elevation and without enzymatic alteration and/or class IV angina. RESULTS: Between February 1996 and July 2010, to 2,818 isolated coronary artery bypass graft performed, 1,016 (36.1%) patients had unstable angina. Multivariate analysis showed that patients with preoperative unstable angina used more medications such as acetylsalicylic acid, beta-blocker, heparin (anticoagulation), nitrate and less need for diuretics than patients without unstable angina. Patients with unstable angina used increased monitoring with Swan-Ganz and support with intra-aortic balloon than stable patients. On outcomes, required longer hospitalization (P=0.030) and had a lower death rate (P=0.018) in the post-coronary artery bypass graft alone. CONCLUSION: Submit patients to coronary artery bypass graft in the presence of acute coronary syndrome such as unstable angina did not increase the mortality rate.

Angiotensin-converting enzyme (ACE) inhibitors reduce the chance of death, myocardial infarction (MI) and cerebrovascular accident (CVA) in patients with coronary disease. However there is no consensus as to its indication in patients undergoing coronary artery bypass grafting (CABG).To assess the relationship between preoperative use of ACE inhibitors and clinical outcomes after CABG.Retrospective cohort study. We included data from 3,139 consecutive patients undergoing isolated CABG in Brazilian tertiary care hospital between January 1996 and December 2009. Follow-up was until discharge or death. Clinical outcomes after surgery were analyzed between users and nonusers of ACE inhibitors preoperatively.Fifty-two percent (n=1,635) of patients received ACE inhibitors preoperatively. The use of ACE inhibitors was an independent predictor of need for inotropic support (OR 1.24, 95% CI 1.01 to 1.47, P = 0.01), acute renal failure (OR 1.23, 95% CI 1.01 to 1.73, P = 0.04) and progression to atrial fibrillation (OR 1.32, 95% CI 1.02 to 1.7, P = 0.03) postoperatively. The mortality rate among patients receiving or not preoperative ACE inhibitors was similar (10.3% vs. 9.4%, P = 0.436), as well as the incidence of myocardial infarction and stroke (15.6% vs. 15.0%, P = 0.694 and 3.4% vs. 3.5%, P = 0.963, respectively).The use of preoperative ACE inhibitors was associated with increased need for inotropic support and higher incidence of acute renal failure and postoperative atrial fibrillation, not associated with increased rates of myocardial infarction, stroke or death.

To analyze the impact of blood transfusion on the incidence of clinical outcomes postoperatively (PO) from cardiac surgery.Retrospective cohort study. We analyzed 4028 patients undergoing coronary artery bypass grafting (CABG), valve (TV), or both, in Brazilian tertiary university hospital between 1996 and 2009. We compared the postoperative complications between patients with blood transfusion (n = 916) and non-blood transfusion (n = 3112). Univariate analysis was performed using the Student t test, and multivariate logistic regression bivariate (stepwise forward). Were considered significant variables with P0.05.Patients who received blood transfusions had more infectious episodes as mediastinitis (4.9% vs. 2.2%, P0.001), respiratory infection (27.8% vs 17.1%, P0.001) and sepsis (6.2% vs. 2.5%, P0.001). There were more episodes of atrial fibrillation (AF) (27% vs. 20.4%, P0.001), acute renal failure (ARF) (14.5% vs 7.3%, P0.001) and stroke (4.8% vs. 2.6%, P = 0.001). The length of PO hospital stay was higher in transfused (13 ± 12.07 days vs. 9.72 ± 7.66 days, P0.001). However, mortality didn't differ between groups (10.9% vs. 9.1%, P = 0.112). The transfusion was shown to be a risk factor for: respiratory infection (OR: 1.91, 95% CI 1.59-2.29, P0.001), AF (OR: 1.35, 95% CI 1.13-1.61, P = 0.01), sepsis (OR: 2.08, 95% CI 1.4-3.07, P0.001), mediastinitis (OR: 2.14, 95% CI: 1.43-3.21, P0.001), stroke (OR: 1.63, 95% CI 1.1-2.41, P = 0.014) and ARF (OR 1.8, 95% CI: 1.39-2.33, P0.001).The blood transfusion is associated with increased risk of infectious events, episodes of AF, ARF and stroke, as well as the increased length of hospital stay but not mortality.