Key result
Pulse rate variability exhibited respiratory peaks even when heart rate spectra were flat in paced children (80 beats/min), indicating PR variability is not a precise surrogate for HR variability.
Why the study?
Does distal pulse rate variability accurately reflect heart rate variability measured by ECG in children?
Population
20 children, comprising 10 with a fixed ventricular pacemaker rhythm and 10 healthy children in sinus rhythm.
Comparison
Measurement of distal pulse rate variability… vs Measurement of heart rate variability using an ECG
Design
Cross-sectional
Authors
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ECG preferred over pulse measures for pediatric HRV assessment; leaves open any adjunctive PRV role in future studies.
Cross-Sectional (n=20)
Does distal pulse rate variability accurately reflect heart rate variability measured by ECG in children?
Pulse rate variability overestimates heart rate variability due to mechanical respiratory influences, indicating that ECG rather than distal pulse wave should be used to study heart rate modulation.
Constant et al. (1999) conducted a cross-sectional in Fixed ventricular pacemaker rhythm (n=20). Pulse rate variability (finger pulse wave) vs. Heart rate variability (ECG) was evaluated on Power spectra for HR and PR in supine and orthostatic positions. Pulse rate variability exhibited respiratory peaks even when heart rate spectra were flat in paced children (80 beats/min), indicating PR variability is not a precise surrogate for HR variability.
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