A Novel Technique to Expand the Electrocardiographic Recording Capability from an Apple Watch

A 75-year-old man with a history of coronary disease and hypertension was referred for his first-ever cardioversion after the incidental discovery of persistent atrial fibrillation by his primary care provider. After adequate treatment with uninterrupted anticoagulation, a QRS-synchronized electrical cardioversion was performed under sedation. In atrial fibrillation the pulse rate was 75 beats per minute. After a single 200 J shock, sinus rhythm was restored at a rate of 65 beats per minute.

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