A 46-Year-Old Man Is Admitted to the Hospital for Elective

A 46-year-old man is admitted to the hospital for elective cholecystectomy.  He is started on intravenous fluids and antibiotics.  Just before he is to go to an operating room, the patient complains of a sudden onset of chest tightness and lightheadedness.  His medical history is significant for anxiety, and he has had 2 previous visits to the emergency department for panic attacks.  His blood pressure is 118/67 mm Hg.  His electrocardiogram is shown in exhibit. Which of the following is the best initial step in treating this patient?

A) Adenosine
B) Alprazolam
C) Amiodarone
D) Lidocaine
E) Nitroglycerine

Correct Answer:

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