To Analysis The High Risky Factors Of Our Hospital Coronary Artery By Pass Grafting

Objective:To analyze the high risky factors of coronary artery by pass grafting (CABG). Methods:The research data clinical material of 232 patients who had been performed CABG operation in the cardiovascular surgery department of the first affiliated hospital of Xinjiang medicla univercity from January 2007 to october 2009. We chosed 22 risk factors accroding to the features of this group patients. First of all, the logistic regression univariate analyses were performed to evaluate the risk factors and then the stepwise logisitic regression analyses were performed to evaluate those significant risk factors. The aim is to sereen the high risky factors for mortality. Results:The results show that 15 risk factors were statistical significance in the logistic regression univariate analyses. They included 9 preoperative selected risk factors,2 intra operative selected risk factors,4 post operative selected risk factors. There were 4 risk factors which were statistical significance in 15 risk factors stepwise logistic regression analyses and respiratory infections, post operative cardiac ventricular arrhythmias, cardiac function (NYHA) grade 3-4 peroperative myocardiac infarction were lined up according to the odds rations (OR) respectively. The stepwise logistic regression analyses show that there were 5 risk factors which were statistical significance in 11 preoperative and intra operative risk factors. According to the OR respectively, they were ranked as follow:CABG performed less than 3weeks after AMI, valvular surgery operation, valvular regurgitation and, left main coronary artery stenosis>50%, the age of 70, The results of stepwise logistic regression analyses is that 5 risk factors were statistical significance in 9 preoperative and risk factors. According to the OR respectively, they were ranked as follow:CABG performed less than 3 weeks after AMI, valvular regurgitation, the age of 70, ejection fraction (EF)<50%, left main coronary artery stenosis>50%. Conelusion:CABG performed less than 3 weeks after AMI, valvular regurgitation, the age of 70, ejection fraction (EF)<50%, left main coronary artery stenosis>50%were in dependent risk factors for mortality in preoperative selected risk factors. Valvular surgery operation was independent risk factor formortality in intraoperative selected risk factors. Respiratory infections, postoperative cardiac ventricular arrhythmias and peroperative myocardic infarction were independent risky factors formortality in postoperative selected risky factors. These factors have important clinical significance. We should pay attention to these factor.