Estimation of blood pressure variability from 24-hour ambulatory finger blood pressure

Stefano Omboni, Gianfranco Parati, Paolo Castiglioni, Marco Di Rienzo, Ben P M Imholz, Gerard J. Langewouters, Karel H. Wesseling, Giuseppe Mancia

Research output: Contribution to journalArticlepeer-review


Portapres is a noninvasive, beat-to-beat finger blood pressure (BP) monitor that has been shown to accurately estimate 24-hour intra-arterial BP at normal and high BPs. However, no information is available on the ability of this device to accurately track ambulatory BP variability. In 20 ambulatory normotensive and hypertensive subjects, we measured 24-hour BP by Portapres and through a brachial artery catheter. BP and pulse interval variabilities were quantified by (1) the SDs of the mean values (overall variability) and (2) spectral power, computed either by fast Fourier transform and autoregressive modeling of segments of 120-second duration for spectral components from 0.025 to 0.50 Hz or in a very low frequency range (between 0.00003 and 0.01 Hz) by broadband spectral analysis. The 24-hour SD of systolic BP obtained from Portapres (24±2 mm Hg) was greater than that obtained intra-arterially (17±1 mm Hg, P0.15 Hz obtained by the Portapres was similar during the day but lower during the night when compared with those obtained by intra-arterial recordings (P

Original languageEnglish
Pages (from-to)52-58
Number of pages7
Issue number1
Publication statusPublished - Jul 1998


  • Blood pressure
  • Blood pressure monitoring, ambulatory
  • Blood pressure variability
  • Portapres
  • Power spectral analysis

ASJC Scopus subject areas

  • Internal Medicine


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