Atrioventricular block Quiz: Ace Your Exams

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A 72-year-old man is brought to the emergency department by ambulance after he collapsed at home. Family reports that he complained of occasional dizziness over the past week. He has a past medical history of hypertension, coronary artery disease, and myocardial infarction 3 years ago. He takes aspirin, atorvastatin, and lisinopril. Temperature is 37°C (98.6°F), blood pressure is 80/50 mmHg, pulse is 20/min, respiratory rate is 18 breaths/min, and oxygen saturation is 82% on room air. He is unresponsive and appears pale, with a faint pulse and distant heart sounds. He has cool extremities and delayed capillary refill. An ECG is performed and is shown below. Which of the following is the best next step in management?


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