A patient with an acute MI on a 12-lead ECG transmitted by the paramedics has the above findings on a rhythm strip when a monitor is placed in the ED. The patient had resolution of moderate (5/10) chest pain with three doses of sublingual nitroglycerine. BP is 104/70 mm Hg. Which intervention below is most important, reducing in-hospital and 30-day mortality?

You are evaluating a patient with a 15-minute duration of chest pain during transportation to the emergency department. He is receiving oxygen, and 2 sublingual nitroglycerin tablets have relieved his chest discomfort. He has no complaints but appears anxious. BP is 130/70 mm Hg. You observe the above rhythm on the monitor and your next action is:

This patient has been resuscitated from cardiac arrest. During the resuscitation amiodarone 300 mg was administered. Now the patient develops severe chest discomfort, is diaphoretic, and has the above rhythm. BP is 80/60 mm Hg. What is the next indicated action: