Key result
Polar HRMI Board shows ~0.98 cross-correlation with resting ECG for measuring serial RR intervals.
Why the study?
The Polar heart rate monitor interface board had not been correlated with ECG to accurately measure the series of RR interval signals at rest.
Does the Polar HRMI Board accurately measure RR intervals compared to ECG in healthy male subjects at rest?
Observational (n=18)
Does the Polar HRMI Board accurately measure RR intervals compared to ECG in healthy male subjects at rest?
The Polar HRMI Board provides reliable measurements of mean RR intervals at rest compared to standard ECG.
May support Polar HRMI Board for resting RR measurement in healthy subjects; leaves open clinical validation and dynamic testing.
BACKGROUND: A Polar heart rate monitor is a device that measures RR intervals, but has not been correlated to accurately measure the series of RR interval signals between the ECG and the Polar[Formula: see text] Heart Rate Monitor Interface (HRMI) Board at rest. OBJECTIVE: The aim of the study was to evaluate the temporal cross-correlations between the Polar[Formula: see text] HRMI Board and an ECG to measure the series of RR intervals at rest. METHODS: The sample consisted of eighteen healthy male subjects and they were instructed to lie in the supine position at rest while breathing normally and a time window of the last 2 min was recorded to analyse RR intervals were obtained for each subject with a Polar[Formula: see text] HRMI Board and an ECG. Cross-correlation analysis of RR interval signals between methods and reliability was expressed by Bland and Altman analysis. RESULTS: The cross-correlation was excellent, resulting in a mean of 0.98 [Formula: see text] 0.01 and no lag or delay between the signals. The bias was 0.03 [Formula: see text] 0.08 s or 8.0% for MeanRRi from Polar[Formula: see text] HRMI Board and ECG, no significant difference. CONCLUSIONS: The Polar[Formula: see text] HRMI Board is acceptable for assessment of serial RR intervals. The results support the reliability of the Mean RR interval compared to a resting ECG.
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Materko et al. (2023) conducted an observational in Healthy (n=18). Polar Heart Rate Monitor Interface (HRMI) Board vs. ECG was evaluated on Temporal cross-correlations of RR interval signals (mean 0.98). The Polar HRMI Board demonstrated excellent cross-correlation (mean 0.98) with resting ECG for measuring serial RR intervals, with no significant bias.
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