Heart Rate Variability: Validity of Autonomic Balance Indicators in Ultra-Short Recordings

GALLARDO, JOSE; BELLONE, GIANNINA; RISK, MARCELO

Communications in Computer and Information Science

Springer Science and Business Media Deutschland GmbH

Año: 2021 vol. 1455 p. 303 - 315

1865-0929

This work aims to find the minimum recording times of ultra-short heart rate variability (HRV) that enable the analysis of autonomic activity indexes. Samples covering 5 min are employed to extract SS and S/PS from the Poincaré diagram from a group of 23 subjects. The RR series, extracted from the electrocardiogram signal, were recorded for 300 s at rest – used as the gold standard – and at intervals of 60, 90, 120, 180 and 240 s to perform the concordance analysis with the gold standard derived indexes. We used four different techniques of concordance: Spearman, Bland, and Altman correlation, and Cliff’s Delta. The SS times within records of 120 s were equivalent to those of short-term HRV and S/PS of 90 s. Also, ultra-short HRV indexes were similar to those obtained for the short-term HRV analysis. Such a reduction in measurement times will allow expanding the use of HRV to monitor the state of health and well-being and help physical trainers achieve better performance in the registration and processing of the information obtained. The results motivate the conduct of new studies to analyze the behavior of these indicators in different populations, using different pre-processing methods than the RR series.