Prognostic Value of the Selvester QRS Score for Perioperative Myocardial Injury Following Non-cardiac Surgery

Inclusion Criteria: * Patients who undergoing elective non-cardiac surgery in the operating room * ≥18 years old * Interpretable preoperative ECG of the patient * Preoperative negative high sensitive Cardiac Troponin T * ASA I-III class * Patients who give the informed consent Exclusion Criteria: * A history of myocardial infarction, coronary artery disease, PCI and revascularization * A history of chronic renal disease, cerebrovascular incident, stroke * ASA class IV * Patients who do not give the informed consent * Patients who undergoing emergency surgery * Patients whose preoperative ECG is not interpretable * Minor procedures to be performed outside or inside the operating room