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Background: In this study, we assessed clinical results by using a minimal extracorporeal circuit (MECC) and compared it to a conventional cardiopulmonary bypass (CPB) system in patients undergoing coronary artery bypass grafting (CABG) procedures.Methods and Materials: From August to October 2006, forty consecutive patients undergoing isolated CABG procedures were randomly assigned to either a miniaturized closed circuit CPB with the Maquet-Cardiopulmonary MECC system (Group M, n=20) or to a conventional CPB system (Group C, n=20). Clinical outcomes were observed before, during and after the operation. Besides evaluating the perioperative clinical data, serial blood venous samples were obtained after induction, 30 minutes after CPB initiation, 2h, 6h, 12h, and 24h post-CPB. The focus of our study was on myocardial damage (cTnI), neutrophil and platelet counts, activated partial thromboplastin time (aPTT) and free hemoglobin.Results: Both the transfusion of packed red blood cells and fresh frozen plasma were significantly lower in Group M compared to Group C (p<0.05). The levels of cTnI were lower in Group M at 2h, 6h and 12h post-CPB than in Group C (p<0.01). The values of aPTT in Group M recovered to normal levels after surgery, but were prolonged in Group C at early post-CPB and were statistically longer than Group M at 2h, 6h, and 12h post-CPB (p<0.05). The concentrations of free hemoglobin in Group C were higher than in Group M during and post-CPB, and there was a statistical difference at 2h post-CPB (p<0.05).Conclusion: In conclusion, the MECC system is a safe alternative for patients who undertake extracorporeal circulation (ECC) for CABG surgery. Lower transfusion requirements and less damage to red cells may further promote the use of MECC systems, especially in higher risk patients. [ABSTRACT FROM AUTHOR]

Abstract: Objective: The European System for Cardiac Operative Risk Evaluation (EuroSCORE) model is a widely used risk prediction algorithm for cardiac surgery in China due to lack of a local model, although its validation has never been tested. The aim of this study was to assess the performance of the logistic EuroSCORE when applied in the Chinese Coronary Artery Bypass Grafting Registry database, which is representative of adult cardiac surgery in China. Methods: The logistic EuroSCORE model was applied to all patients undergoing coronary artery bypass grafting (CABG) surgery at 35 centres in China between January 2004 and December 2005. The entire cohort and a subgroup of patients undergoing isolated CABG were analysed. The calibration of the EuroSCORE model was assessed by comparing observed and predicted in-hospital mortalities. Discrimination was tested by determining the area under the receiver operating characteristic (ROC) curve. Results: The Chinese CABG Registry Study recruited 9248 patients. There were significant differences in the prevalence of risk factors between the Chinese population and European cardiac surgical populations. For the entire cohort, the predicted mortality was 5.51% and observed mortality was 3.27%. Of the isolated CABG subset of 8120 patients, the predicted mortality was 4.21% and the observed mortality was 2.22%. The logistic EuroSCORE overpredicted observed mortality for the entire cohort and the isolated CABG subset at all risk tertiles to different degrees. The discriminative power of EuroSCORE was acceptable but not very satisfactory, with an area under the ROC curve of 0.72 for the entire cohort and 0.71 for the isolated CABG subset. Conclusion: EuroSCORE model does not accurately predict outcomes in this group of Chinese CABG patients. Therefore, caution should be exercised when using it for risk prediction in China. Creation of a new model, which accurately predicts outcomes in Chinese CABG patients, is warranted. [Copyright &y& Elsevier]

Objectives: The EuroSCORE II is an updated version of the EuroSCORE. This multicentre study validated the EuroSCORE II and logistic EuroSCORE in Chinese patients who underwent heart valve surgery., Methods: A total of 11 170 adult patients underwent heart valve surgery from January 2008 to December 2011. Model discrimination and calibration were assessed for both EuroSCORE II and logistic EuroSCORE. The patients were divided into three subgroups according to the weight of the procedures, and the performance of EuroSCORE II for each group was assessed. A correlation analysis was performed for operative complications and EuroSCORE II., Results: The in-hospital mortality of this series was 2.02% (226 of 11 170), and the predicted mortality rate was 2.62±5.75% by EuroSCORE II and 2.55±6.51% by logistic EuroSCORE (LES). The C-statistics of EuroSCORE II and LES were 0.72 [95% confidence interval (CI) 0.69-0.75] and 0.67 (95% CI 0.63-0.70), respectively. Both models failed the Hosmer-Lemeshow goodness-of-fit test, with a P<0.05. According to the weight of the procedure, the isolated non-CABG subgroup had the best discrimination (C-statistics: 0.76 in the non-CABG group, 0.67 in the 2 procedures group and 0.73 in the 3+ procedures group). The complication ratio was strongly related to the EuroSCORE II-predicted mortality (Pearson correlation coefficient: 0.90 for ARDS, 0.97 for acute renal failure, 0.97 for prolonged ventilation and 0.94 for a prolonged ICU stay)., Conclusions: EuroSCORE II was an improvement upon its original logistic model for Chinese patients who underwent heart valve surgery, particularly for a single-valve procedure. The EuroSCORE II-predicted mortality correlated with the operative complications.