Critical appraisal of indices for the assessment of baroreflex sensitivity

M. Di Rienzo, P. Castiglioni, G. Mancia, G. Parati, A. Pedotti

Research output: Contribution to journalArticle

Abstract

The sequence technique and the spectral estimation of the alpha coefficient are currently employed for the assessment of 'spontaneous' baroreflex sensitivity (BRS). The comparison of performance and effectiveness of these techniques is obtained by the analysis of systolic blood pressure (SBP) and pulse interval (PI) tracings recorded in conscious cats before and after baroreceptor denervation. Results indicate that (1) the average BRS estimates obtained by the sequence technique and by the alpha coefficient at the respiratory frequency are similar, (2) the alpha coefficients computed at the respiratory frequency tend to be higher than alpha coefficients estimated at 0.1 Hz, and (3) in spite of what is traditionally claimed, the PI-SBP coherence does not seem to represent a reliable parameter to enhance the specificity of the spectral estimate, because coherence values often remain above the 0.5 threshold also after baroreceptor denervation.

Original languageEnglish
Pages (from-to)246-249
Number of pages4
JournalMethods of Information in Medicine
Volume36
Issue number4-5
Publication statusPublished - 1997

Keywords

  • Arterial Blood Pressure
  • Baroreceptor Sensitivity
  • Heart rate variability

ASJC Scopus subject areas

  • Health Informatics
  • Health Information Management
  • Nursing(all)

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