USMLE Step 3 - Question 13

A 46 year old female with a history of alcohol abuse was brought to the emergency room for altered mental status. Her temperature is 37.0 C (98.6 F), blood pressure is 120/80, heart rate 70, respirations 16. Physical examination reveals a cachectic appearing female, normal breath sounds, and normal heart sounds without murmurs. In the emergency room she becomes completely unresponsive for 1 minute and her blood pressure decreases to 50/30. Her telemetry strip during the event is below as well as her 12 lead ECG afterwards.



What is the best treatment at this time?

A. Intravenous saline

B. Intravenous procainamide

C. Intravenous calcium

D. Intravenous magnesium