Smartphone PPG to detect atrial fibrillation

FibriCheck PPG showed ~96% sensitivity and specificity versus cardiologist ECG on analysable traces.

Source

Mobile Phone-Based Use of the Photoplethysmography Technique to Detect Atrial Fibrillation in Primary Care: Diagnostic Accuracy Study of the FibriCheck App

Proesmans T, Mortelmans C, Van Haelst R, et al. · JMIR mHealth and uHealth · 2019

doi.org/10.2196/12284 Read the full paper ↗93 citationscc by

What they did

Primary-care patients underwent FibriCheck PPG and 12-lead ECG; accuracy calculated after excluding pacing and poor signals.

What they found

241 enrolled; 223 analysed. Sensitivity 95.6%, specificity 96.6% vs ECG.

The limits

What it doesn't show

Needs adequate signal quality; pacing excluded; PPV/NPV depend on prevalence.

Key terms

PPG: Optical pulse sensing via phone.
FibriCheck: App classifying AF from PPG.
Sensitivity: True AF detection rate.
Specificity: True non-AF rule-out rate.
12-lead ECG: Cardiologist reference.
Atrial fibrillation: Irregular atrial arrhythmia.

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Sensitivity:

Common questions

Sensitivity?

95.6%.

Specificity?

96.6%.

Final N?

223.

Excluded?

18 paced.