Key result
Middle-amplitude points yield the most accurate PRV analysis, with forehead PPG outperforming finger PPG.
Why the study?
The optimal fiducial points for pulse rate variability analysis from forehead and finger photoplethysmographic signals as a surrogate for heart rate variability have not been determined.
Population
Subjects undergoing a tilt-table test with simultaneous forehead PPG, finger PPG, and ECG recording
Comparison
Five fiducial points from forehead and finger PPG signals vs ECG RR intervals
Design
Comparative physiological signal analysis study
Authors
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May refine PRV methodology in research settings; leaves open prospective validation before any clinical adoption.
Observational
The middle-amplitude point of the PPG signal is the most accurate fiducial point for pulse rate variability analysis, and forehead PPG provides more reliable information than finger PPG.
Peralta et al. (2019) reported an observational. Five fiducial points for pulse rate variability analysis from forehead and finger PPG vs. Heart rate variability from ECG was evaluated on Relative errors between PRV and HRV indices, correlation coefficients, and reliability indices. The middle-amplitude point of the PPG signal is the most accurate fiducial point for PRV analysis, with forehead PPG providing more reliable information than finger PPG.
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