Myocardial ischemia score as a preoperative screening method for intraoperative myocardial ischemia

Three hundred patients for abdominal surgery with risk factors of ischemic heart disease (IHD), such as hypertension, diabetes mellitus, hyperlipidemia, smoking, old age, obesity, familial history, electrocardiographic abnormality, other perivascular diseases and male, were included in this study. Patients older than forty years were included in the study. ST segment in lead II and V5 was recorded by ST trend monitor from the time of entering the operating room to the time of exit and intraoperative myocardial ischemia occurred in 58 patients (19.3%). Correlation coefficients between each risk factor of IHD and intraoperative myocardial ischemia were calculated by multiple regression analysis and myocardial ischemia score (MIS) was determined. Intraoperative myocardial ischemia increased in patients with more than 10 points of MIS by discriminant analysis and hitting ratio of MIS was 86.3%.