Ischemic colitis Quiz: Ace Your Exams

A 77-year-old woman presents to the emergency department to be evaluated for sudden and severe abdominal pain, which began abruptly the evening prior to admission. There is associated hematochezia and she states she has a “fluttering sensation” in the chest. Past medical history includes diabetes mellitus, hypertension, and a myocardial infarction five years ago. Temperature is 36.0°C (96.8°F), blood pressure is 85/63 mmHg, pulse is 132/min, and O₂ saturation is 98% on room air. Physical examination shows a pale, ill-appearing woman with diffuse abdominal tenderness to palpation. The patient's ECG is shown below. Which of the following is the next best step in management?  


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