Inclusion Criteria:  Patients who underwent inpatient noncardiac surgery, who had myocardial injury after non-cardiac surgery (MINS) protocol ordered for postoperative high sensitivity troponin monitoring based on the Canadian Cardiovascular Society (CCS) guidelines Patients who underwent inpatient non-cardiac surgery from January 2020 to June 2021.  Exclusion Criteria:  Patients who did not have intraoperative and postoperative vital signs Patients who did not have any postoperative troponin measurements Patients who underwent repeat surgery Patients who were readmitted within the first 72 hours postoperatively Patients who had positive troponin on postoperative day 4