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. 2020 Jun 28;6(10):808–809. doi: 10.1016/j.hrcr.2020.06.021

Figure 1.

Figure 1

A: The Apple Watch (Apple Inc, Cupertino, CA) provides a lead I electrogram. In this standard configuration worn on the patient’s wrist, the patient’s atrial tachyarrhythmia appears consistent with atrial fibrillation. B: The same tachyarrhythmia is assessed using the Apple Watch in a lead II configuration by placing the watch on the patient’s thigh and placing the right index finger on the digital crown. In this configuration, the patient’s rhythm is actually identified to be typical atrial flutter with variable atrioventricular conduction. Superimposing the Apple Watch tracing over the patient’s standard lead II obtained via 12-lead demonstrates the accuracy of this method.