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. Author manuscript; available in PMC: 2024 Jul 18.
Published in final edited form as: J Am Coll Cardiol. 2023 Jul 18;82(3):245–264. doi: 10.1016/j.jacc.2023.04.054

FIGURE 1. Basic Methodology of PPG.

FIGURE 1

Schematic of a wrist-worn consumer wearable device (A) and basic methodology of photoplethysmography (PPG) for a consumer wearable device (B). PPG signals are integrated over time to derive common clinical metrics such as heart rate (C).