You arrive on-scene and find a 56 year-old diabetic woman complaining of chest discomfort. She is pale and diaphoretic, complaining of lightheadedness. Her BP is 80/60 mm Hg. The cardiac monitor documents the rhythm above. She is receiving oxygen at 4 L/min by Nasal Cannula, and an IV has been established. Transcutaneous Pacing has been requested but is not yet available. Your next order is: