Spectral and sequence analysis of finger blood pressure variability: Comparison with analysis of intra-arterial recordings

Stefano Omboni, Gianfranco Parati, Alessandra Frattola, Emanuela Mutti, Marco Di Rienzo, Paolo Castiglioni, Giuseppe Mancia

Research output: Contribution to journalArticle

Abstract

The aim of our study was to assess whether the Finapres device is able to accurately monitor not only average blood pressure values but also blood pressure variability. To examine this issue, we analyzed 30-minute recordings of finger and intra-arterial pressure simultaneously obtained at rest in 14 patients. We compared systolic blood pressure, diastolic blood pressure, mean arterial pressure, pulse interval (the reciprocal of heart rate), overall variability (standard deviation), and specific time-domain and frequency-domain components. Systolic blood pressure, diastolic blood pressure, mean arterial pressure, and pulse interval spectral powers were computed by fast Fourier transform over three frequency bands: low frequency (0.025 to 0.07 Hz), midfrequency (0.07 to 0.14 Hz), and high frequency (0.14 to 0.35 Hz). The coherence, ie, the degree of association between blood pressure and pulse interval powers obtained by the two techniques, was also assessed. Standard deviations of diastolic blood pressure, mean arterial pressure, and pulse interval were similar when assessed from the two recordings, whereas standard deviation of systolic blood pressure was overestimated by analysis of finger pressure recordings. All powers of diastolic blood pressure and mean arterial pressure and high-frequency powers of systolic blood pressure estimated from analysis of finger blood pressure tracings were superimposable to those obtained by analyzing invasive recordings. Low-frequency and midfrequency powers of intra-arterial systolic blood pressure were significantly overestimated by the analysis of finger blood pressure tracings (+13.7±4.4 mm Hg2, P2, P

Original languageEnglish
Pages (from-to)26-33
Number of pages8
JournalHypertension
Volume22
Issue number1
Publication statusPublished - Jul 1993

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Keywords

  • Blood pressure determination
  • Blood pressure monitors
  • Pressoreceptors
  • Spectrum analysis

ASJC Scopus subject areas

  • Internal Medicine

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