What question did this study set out to answer?

Compare spectral indices of photoplethysmogram variability recorded from the earlobe and bilateral fingers and evaluate their synchronization with heart rate variability during orthostatic stress.

March 30, 2016Physiological MeasurementOpen Access

A comprehensive assessment of cardiovascular autonomic control using photoplethysmograms recorded from the earlobe and fingers

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Why the study?

Does joint analysis of PPG variability from the earlobe and fingers and HRV provide information about cardiovascular autonomic control in healthy subjects?

Population

30 healthy subjects (26 men), median age 27 (IQR 25-29) years

Comparison

Photoplethysmogram recorded from the earlobe and… vs Heart rate variability (HRV) indices

Design

Cross-sectional

Authors

AKAnton R. KiselevGeneral / Preventive / Lipids СМС. А. МироновKurchatov Institute AKAnatoly S. KaravaevCross-Cutting Cardiology

Discussion

Member takes

Implication

Earlobe PPGV may reduce respiratory artifact in autonomic assessment; leaves open whether combined PPGV-HRV analysis adds clinical value.

Key Points

Compare spectral indices of photoplethysmogram variability recorded from the earlobe and bilateral fingers and evaluate their synchronization with heart rate variability during orthostatic stress.
Evaluated 30 healthy participants (26 men, median age 27 [interquartile range 25–29] years) at rest and during a head-up tilt test.
Recorded simultaneous photoplethysmograms from the earlobe and bilateral middle fingers alongside electrocardiograms to assess spectral indices (total power, LF%, HF%, LF/HF ratio, coherence) and low-frequency synchronization index S.
Head-up tilt induced stable blood pressure and moderate heart rate increases, accompanied by an increased synchronization index S between low-frequency oscillations in heart rate variability and photoplethysmogram variability.
Spectral coherence was high between bilateral finger photoplethysmograms but differed substantially from earlobe recordings; earlobe signals exhibited less respiratory-driven high-frequency variability across both body positions.

Structured PICO

Does joint analysis of PPG variability from the earlobe and fingers and HRV provide information about cardiovascular autonomic control in healthy subjects?

Population

30 healthy subjects (26 men), median age 27 (IQR 25-29) years

Intervention

Photoplethysmogram (PPG) recorded from the earlobe and middle fingers of both hands during rest and head-up tilt test

Comparator

Heart rate variability (HRV) indices

Outcome

Spectral indices of PPG variability (PPGV) and HRV (mean HR, total spectral power, HF%, LF%, LF/HF ratio, spectral coherence, and index S of synchronization)surrogate

Joint analysis of frequency components of PPG variability from the earlobe and fingers alongside HRV provides additional insights into cardiovascular autonomic control.

Cite This Study

Kiselev et al. (2016) studied this question.

synapsesocial.com/papers/6a83f22bd5cebee0d06a8ca6 https://doi.org/10.1088/0967-3334/37/4/580

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A comprehensive assessment of cardiovascular autonomic control using photoplethysmograms recorded from the earlobe and fingers

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

A comprehensive assessment of cardiovascular autonomic control using photoplethysmograms recorded from the earlobe and fingers

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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