Background: The 2014 ACC/AHA Perioperative Guidelines suggest using the Revised Cardiac Risk Index (RCRI), myocardial infarction or cardiac arrest (MICA), or American College of Surgeons (ACS)-NSQIP calculators for combined patient-surgical risk assessment. However, there is no published data comparing their performance. Methods: We retrospectively reviewed records of 663 patients seen in our preop clinic who [...]