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Measurement of heart-rate variability: Part 2-hardware digital device for the assessment of heart-rate variability

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Abstract

Part 1 of the paper was dedicated to some general aspects of h.r.v. measurements. In Part 2, the spectral properties of the integral pulse frequency modulator (i.p.f.m.) are shown. The choice of a hardware device for lowpass filtering the cardiac event series by means of a stepwise convolution is discussed. A method to overcome the problems of distortion due to spurious spectral components in the filter passband is shown. The hardware realisation of the filter is described and results are given.

Sommaire

La première partie du texte était consacrée à quelques aspects généraux de la mesure de la v.r.c. Dans cette partie, les auteurs exposent les propriétés spectrales du modulateur intégrateur d'impulsions en fréquence. L'article examine le choix d'un matériel pour le filtrage passe-bas de la série d'événements cardiaques au moyen d'une circonvulation pas-à-pas. Il décrit une méthode pour résoudre les problèmes de distorsion dus aux composants spectraux parasites dans la bande passante du filtre. Il décrit enfin la fabrication du filtre ainsi que de résultats.

Zusammenfassung

Teil I des Textes widmete sich einigen allgemeinen Aspekten von HRV-Messungea. In diesem Teil werden die Spektraleigenschaften des integralen Impulsfrequenzmodulators (IPFM) gezeigt. Behandelt wird außerdem die Wahl einer Vorrichtung zur Tiefpaßfilterung der Herzätig-keitsreihe mit Hilfe einer stufenweisen Windung. Eine Methode zur Überwindung der Probleme der Verzerrung infolge störender Spektralkomponenten im Filterpaßband wird gezgeigt. Eine Hardware-Realisation des Filters wird beschrieben und die Resultate angegeben.

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References

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Coenen, A.J.R.M., Rompelman, O. & Kitney, R.I. Measurement of heart-rate variability: Part 2-hardware digital device for the assessment of heart-rate variability. Med. Biol. Eng. Comput. 15, 423–430 (1977). https://doi.org/10.1007/BF02457997

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