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the claim

Smartwatch electrocardiogram sensors can detect atrial fibrillation with high sensitivity and specificity.

the verdict
INSUFFICIENT LEANING
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Smartwatch electrocardiogram sensors can detect atrial fibrillation with high sensitivity and specificity?

Unclear. Several peer-reviewed sources indicate consumer smartwatches detect atrial fibrillation with high accuracy, and one meta-analysis reports pooled sensitivity of 97.4% and specificity of 96.6% for PPG smartwatches. However, none of the retrieved items reports sensitivity and specificity specifically for smartwatch ECG sensors, so the claim is only partially covered.

Verdict: PARTIAL LEAN · 5 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5
Accuracy of Smartwatches in the Detection of Atrial Fibrillation: A Systematic Review and Diagnostic Meta-Analysis -
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Accuracy of Smartwatches in the Detection of Atrial Fibrillation: A Systematic Review and Diagnostic Meta-Analysis - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1016/j.jacadv.2025.102133

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More for · 4
Diagnostic accuracy of ECG smart chest patches versus PPG smartwatches for atrial fibrillation detection: a systematic review and meta-analysis.
2025
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O, S., CM, H., A, O., H, G., J, M., & MM, C. (2025). Diagnostic accuracy of ECG smart chest patches versus PPG smartwatches for atrial fibrillation detection: a systematic review and meta-analysis.. doi.org. https://doi.org/10.1186/s12872-025-04582-2

Multi-sensor wearables re-shaping care of chronic heart-failure: A narrative review.
2025
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Elechi, U. S., Udoh, K., Orobator, E. T., Demola, M. B., Tarawallie, M. A., & Lawal, O. P. (2025). Multi-sensor wearables re-shaping care of chronic heart-failure: A narrative review.. doi.org. https://doi.org/10.25259/IJMR_1617_2025

Watch out for ST-elevation myocardial infarction: a case report of ST-elevation in single-lead electrocardiogram tracing of a smartwatch
2020
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Watch out for ST-elevation myocardial infarction: a case report of ST-elevation in single-lead electrocardiogram tracing of a smartwatch. (2020). doi.org. https://doi.org/10.1093/ehjcr/ytaa353

Detection of Atrial Fibrillation in a Large Population Using Wearable Devices: The Fitbit Heart Study
2022
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Detection of Atrial Fibrillation in a Large Population Using Wearable Devices: The Fitbit Heart Study. (2022). doi.org. https://doi.org/10.1161/circulationaha.122.060291

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