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

Figure 1. Smartphone‑based assessment of the cardiac rhythm using the FibriCheck® application. The ECG-bone, attached to a subject’s chest, for obtaining a single‑lead electrocardiogram wirelessly connected to the smartphone by the FibriCheck® application.

Figure 2. A snapshot of a synchronized photoplethysmography signal and single-lead electrocardiogram in patient with sinus rhythm (left) and atrial fibrillation (right). The red dots indicate a detected heart beat. ECG: electrocardiogram; PPG: photoplethysmography.

Figure 3. Study flowchart. AF: atrial fibrillation.