lthough major noncardiac surgery has the potential to improve the quality and prolong the duration of a patient's life, surgery may also precipitate complications such as death from cardiac causes, myocardial infarction or injury, cardiac arrest, or congestive heart failure. 1 In this article, we review what is known about the epidemiology and mechanisms of perioperative cardiac complications (i.e., from induction of anesthesia to within 30 days after surgery), preoperative methods of predicting these complications, perioperative cardiac interventions, and postoperative monitoring. Epidemiol ogy a nd Mech a nisms of Per ioper ati v e C a r di ac Complic ations