ECG Challenge: Fast Heartbeat With a Pacemaker

Philip J. Podrid, MD


January 25, 2022

A 68-year-old man with a history of a low left ventricular ejection fraction and symptomatic bradycardia who is treated with a pacemaker presents to his primary care provider for a routine physical examination. His heart rate is noted to be regular and rapid. Physical examination is otherwise unremarkable. A 12-lead ECG is obtained.

Figure 1.


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