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Updated: Sep 4, 2025

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
Published on: December 11, 2019
Six-lead device superior to single-lead smartwatch ECG in atrial fibrillation detection
Josca Scholten1, Ward P J Jansen2, Thomas Horsthuis2
1Department of Cardiology, Tergooi Hospital, Blaricum, North Holland, the Netherlands; Location Academic Medical Center, Department of Cardiology, Amsterdam University Medical Center, Meibergdreef 9, Amsterdam, North Holland 1105 AZ, the Netherlands.
Abstract:
This was a head-to-head comparative study on different electrocardiogram (ECG)-based smartwatches and devices for atrial fibrillation detection. We prospectively included 220 patients scheduled for electrical cardioversion and recorded ECGs with 3 different devices (Withings Move ECG, Apple Watch 5, Kardia Mobile 6-leads) as well as the standard 12-lead ECG (gold standard), both before and after cardioversion. All atrial fibrillation detection algorithms had high accuracy (sensitivity and specificity: 91-99%) but were hampered by uninterpretable recordings (20-24%). In cardiologists' interpretation, the 6-lead device was superior (sensitivity 99%, specificity 97%) to both single-lead smartwatches (P < .05) for atrial fibrillation detection.
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