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. 2018 Jul 31;7(15):e009351. doi: 10.1161/JAHA.118.009351

Figure 2.

Figure 2

Representative example of photo‐plethysmography (PPG) waveform, PPG‐derived inter‐pulse intervals (IPI), and corresponding ECG‐derived inter‐beat intervals (IBI) during atrial fibrillation (AF; left) and normal sinus rhythm (NSR; right) in the Holter data set (HOL).