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Temporal cross-correlation between Polar® heart rate monitor interface board and ECG to measure RR interval at rest

2023; IOS Press; Volume: 32; Issue: 1 Linguagem: Inglês

10.3233/ies-230061

1878-5913

Wollner Materko, Caio César dos Reis Façanha, Gizelly Coelho Guedes, Marcela Fabiani Silva Dias, Alisson Vieira Costa, Dilson Rodrigues Belfort, Demilto Yamaguchi da Pureza, Álvaro Adolfo Duarte Alberto,

Cardiovascular Syncope and Autonomic Disorders

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® Heart Rate Monitor Interface (HRMI) Board at rest. OBJECTIVE: The aim of the study was to evaluate the temporal cross-correlations between the Polar® 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® 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 ± 0.01 and no lag or delay between the signals. The bias was 0.03 ± 0.08 s or 8.0% for MeanRRi from Polar® HRMI Board and ECG, no significant difference. CONCLUSIONS: The Polar® 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.