The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 75-year-old man becomes pulseless in the cardiac intensive care unit 48 hours after admission for ST-elevation myocardial infarction. His blood pressure is 50/20 mm Hg. The ECG monitor shows a tachycardic irregular rhythm with erratic undulations, but no discernible P waves or QRS complexes. During immediate advanced cardiac life support, two attempts at defibrillation are made, after which the patient is given 1 mg of IV epinephrine. After another attempt at defibrillation, the patient remains pulseless and his blood pressure is 60/35 mm Hg. The ECG monitor shows no changes. Administration of which of the following is the most appropriate next step in management?   (A) Amiodarone   (B) Epinephrine   (C) Dopamine   (D) Atropine
['(A) Amiodarone <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Amiodarone \n (B) Epinephrine \n (C) Dopamine \n (D) Atropine <> possible answers', '  A 75-year-old man becomes pulseless in the cardiac intensive care unit 48 hours after admission for ST-elevation myocardial infarction. His blood pressure is 50/20 mm Hg. The ECG monitor shows a tachycardic irregular rhythm with erratic undulations, but no discernible P waves or QRS complexes. During immediate advanced cardiac life support, two attempts at defibrillation are made, after which the patient is given 1 mg of IV epinephrine. After another attempt at defibrillation, the patient remains pulseless and his blood pressure is 60/35 mm Hg. The ECG monitor shows no changes. Administration of which of the following is the most appropriate next step in management? <> context@']