What is the clinical evidence from this study?

Study design: Observational. Population: Healthy volunteers (n=28). Intervention: Down-sampled photoplethysmography (PPG) vs. 10 kHz-sampled electrocardiogram (ECG). Primary outcome: Significant differences in time- and frequency-domain variables of pulse rate variability compared to heart rate variability (p=<0.05).

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February 7, 2017Open Access

Photoplethysmography sampling frequency: pilot assessment of how low can we go to analyze pulse rate variability with reliability?

Q: What are the key findings of this study?

Analysis of pulse rate variability derived from photoplethysmography is potentially as reliable as heart rate variability from electrocardiogram when a sampling frequency of ≥25 Hz is used.

Key Result

Analysis of pulse rate variability derived from photoplethysmography is potentially as reliable as heart rate variability from electrocardiogram when a sampling frequency of ≥25 Hz is used.

Study Design

Type

Observational (n=28)

PICO

Population

Healthy volunteers (n=28)

Intervention / Comparator

Down-sampled photoplethysmography (PPG) vs 10 kHz-sampled electrocardiogram (ECG) (Sampling frequencies from 5000 Hz down to 5 Hz)

Primary Outcome

Significant differences in time- and frequency-domain variables of pulse rate variability compared to heart rate variability, p=<0.05

Main Result

p-value: p=<0.05

Limitations

Focused only on normal conditions (normal heart rate, supine position, resting without sleeping).
Did not include subjects with cardiovascular diseases such as arrhythmia or subjects in dynamic conditions like exercise.
Assumed perfect detection of the PPG peak position, which may not reflect actual situations where peak detector performance could be degraded.

Abstract

⩾25 Hz sampling frequency is used.

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Cite This Study

Choi et al. (Tue,) conducted a observational in Healthy volunteers (n=28). Down-sampled photoplethysmography (PPG) vs. 10 kHz-sampled electrocardiogram (ECG) was evaluated on Significant differences in time- and frequency-domain variables of pulse rate variability compared to heart rate variability (p=<0.05). Analysis of pulse rate variability derived from photoplethysmography is potentially as reliable as heart rate variability from electrocardiogram when a sampling frequency of ≥25 Hz is used.

synapsesocial.com/papers/6a14e4f90b551a59723913c5 https://doi.org/https://doi.org/10.1088/1361-6579/aa5efa