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—To assess the relationship between body temperature and cardiac morbidity during the perioperative period.

—Randomized controlled trial comparing routine thermal care (hypothermic group) to additional supplemental warming care (normothermic group).

—Operating rooms and surgical intensive care unit at an academic medical center.

—Three hundred patients undergoing abdominal, thoracic, or vascular surgical procedures who either had documented coronary artery disease or were at high risk for coronary disease.

—The relative risk of a morbid cardiac event (unstable angina/ischemia, cardiac arrest, or myocardial infarction) according to thermal treatment. Cardiac outcomes were assessed in a double-blind fashion.

—Mean core temperature after surgery was lower in the hypothermic group (35.4±0.1°C) than in the normothermic group (36.7±0.1°C …