Risk factors and outcome in Iranian cardiac surgery: Iranian heart score.

Coronary artery bypass grafting (CABG) is one of the leading operations performed worldwide. This treatment modality has been performed in Iran for several years; however, little is known about the current risk profile of Iranian cardiac surgical patients. The authors investigated the relationship between risk factors and mortality assessed by logistic regression analysis. The final Iranian risk stratification model consists of 15 variables, including sex, age, preoperative ejection fraction, chronic renal failure, recent myocardial infarction, unstable angina, preoperative critical situation, run off of left anterior descending artery, indications for surgery, CABG + mitral valve replacement, CABG + aortic valve replacement, postoperational myocardial infarction, postoperational low cardiac output, prolonged intubation, and central nervous system complication. A number of risk factors contribute to cardiac surgical mortality in Iran, which is used to develop a risk stratification system for predication of hospital mortality and the assessment of quality of care.