ECG Challenge: What's Irregular About This Rhythm?

A 27-year-old woman presents to her primary care provider for a routine physical examination. She denies any heart disease and has never had any cardiac symptoms. However, on physical examination, the clinician detects an irregular heart rhythm, and a 12-lead ECG is obtained.

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Figure 1. Courtesy of Dr Podrid.

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Cite this: ECG Challenge: What's Irregular About This Rhythm? - Medscape - Jan 05, 2018.