A 67-year-old man with a history of hypertension and mild mitral regurgitation (treated with a beta-blocker and hydrochlorothiazide) presents to the emergency department because of intermittent palpitations and shortness of breath. His physical examination reveals a slow pulse and a soft holosystolic murmur but is otherwise unremarkable.
An ECG is obtained.
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Cite this: ECG Challenge: In the ED With Palpitations and Shortness of Breath - Medscape - Nov 30, 2021.