title: [Spectrum analysis of the r-r interval using a PC].
abstract: Spectral analysis of r-r variability has been recently proposed as a clinical tool to assess the autonomic nervous system function. In this article we present the results obtained using an equipment and an analysis software (based on Maximum Entropy Method) developed in our laboratory. Analyzing the tachograms derived from prolonged ECG registrations of 12 young healthy subjects, 24 to 36 years old (mean 31 +/- 4), we observed the two classic components of the signal: a low frequency component (0.7 +/- 0.2 Hz) and a high frequency component (0.21 +/- 16.6 Hz). As expected, standing, a simple manoeuvre augmenting sympathetic activity, caused a stronger predominance of the low frequency component. We conclude that our method is reliable to evaluate, by means of spectral analysis, rhythmical oscillations of r-r variability.
authors.affiliation: I Divisione Medicina, Ospedale S. Martino, Genova.
authors.forename: G
authors.initials: G
authors.lastname: Gigli
authors.forename: M
authors.initials: M
authors.lastname: Casu
authors.forename: M
authors.initials: M
authors.lastname: Colombano
authors.forename: M
authors.initials: M
authors.lastname: Ponte
authors.forename: G
authors.initials: G
authors.lastname: Reggiardo
authors.forename: M
authors.initials: M
authors.lastname: Casella
authors.forename: G
authors.initials: G
authors.lastname: Lamedica
mesh_terms: D000328:Adult; D000465:Algorithms; D004562:Electrocardiography / Q000379:methods*; D006329:Heart Conduction System / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D008838:Microcomputers; D011187:Posture; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted; D012984:Software
vernacular_title: L'analisi spettrale degli intèrvalli r-r mediante PC.