The factors identified in this study as independently associated with increased risk of postoperative cardiac complications were age ≥75 years, the presence of type I diabetes mellitus, SAP≥180 mm Hg, and signs of ischemia in the ECG, along with type of surgery and episodes of hypotension. These variables, considered separately or as a group, are biologically plausible and consistent with the physiological mechanism underlying the appearance of cardiac complications in the postoperative period