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Review Question - QID 214230

Atrioventricular (AV) Heart Block Introduction Differential QID: 214230 (M2.OMB.20.4759)
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QID 214230 (Type "214230" in App Search)
A 68-year-old man presents to the emergency department for evaluation after an episode of near syncope. He was at home and states that he nearly fainted while walking to the bathroom. His past medical history is significant for diabetes mellitus, hypertension, and smoking. His temperature is 99.0°F (37.2°C), blood pressure is 105/68 mmHg, pulse is 54/min, respirations are 15/min, and oxygen saturation is 95% on room air. Cardiopulmonary exam is notable for bradycardia. Lungs are clear to auscultation bilaterally. Exam is otherwise unremarkable. An electrocardiogram is obtained as seen in Figure A. Which of the following is the most likely diagnosis?
  • A
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  • A