A 55-year-old woman is admitted to the intensive care unit (ICU) for ventilator management after an AAA repair. The patient is noted to have a urine output of 20 mL over three hours. Her blood pressure is 100/55 mm Hg, heart rate 110 beats/min, and temperature 35.6°C (96.1°F).

Her serum troponin levels are elevated.