Fig. 3: Demonstration of the CardioWatch 287-2 photoplethysmography (PPG)-based atrial fibrillation detection method. | npj Digital Medicine

Fig. 3: Demonstration of the CardioWatch 287-2 photoplethysmography (PPG)-based atrial fibrillation detection method.

From: Ambulatory atrial fibrillation detection and quantification by wristworn AI device compared to standard holter monitoring

Fig. 3

This method includes the algorithm developed by Happitech (Rotterdam, the Netherlands) which, here, is applied on a 100-s time window and shows the detection of an irregular heart rythm. In the upper pannel a poncoire plot is included, demonstrating the instability of RR-intervals. An RR Tachogram follows, showing the variation in RR-intervals over a time period of 100-s. Finally, the raw PPG data of the 100-s window is shown.

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