PPG datasets with synchronised ECG

Datasets that record PPG and ECG together let you use ECG R-peaks as the reference for heart rate and inter-beat intervals, measure pulse arrival time for blood pressure work, and test PPG beat detection against a gold standard. This list only includes datasets where both raw waveforms can be downloaded, sorted by number of subjects. Check whether the two signals share a clock, and the sampling rate of each, before you align beats.