The present study compares the spectral characteristics of 24-h blood pressure variability estimated invasively at the brachial artery level with those estimated by measurement of blood pressure at the finger artery using the non-invasive Portapres device. Broad-band spectra (from 3×10-5 to 0.5 Hz) were derived from both finger and intra-brachial pressures recorded simultaneously for 24 h in eight normotensive and twelve hypertensive ambulant subjects. At frequencies lower than 0.07 Hz, higher spectral estimates were obtained by Portapres than by intra-brachial measurements. The maximum overestimation occurred in systolic pressure at around 10-2 Hz, where the amplitude of the oscillations was two times greater when measured by Portapres. A less pronounced overestimation was found for diastolic pressures. The maximum overestimation was greater during daytime than during night-time. At around 0.1 Hz, invasive and non-invasive spectra were similar. At the respiratory frequencies (0.15-0.50 Hz), the power spectra were overestimated by Portapres during daytime, and underestimated at night. These results provide reference information for the correct interpretation of Portapres data in the estimation of 24-h blood pressure spectral power.
Skip Nav Destination
Article navigation
Research Article|
June 16 1999
Broad-band spectral analysis of 24 h continuous finger blood pressure: comparison with intra-arterial recordings
Paolo CASTIGLIONI;
*LaRC, Centro di Bioingegneria, Fondazione Don C. Gnocchi and Politecnico di Milano, via Gozzadini 7, I-20148 Milan, Italy
Correspondence: Dr Paolo Castiglioni.
Search for other works by this author on:
Gianfranco PARATI;
Gianfranco PARATI
†Istituto Scientifico Ospedale S. Luca, Istituto AuxologicoItaliano, Milan, Italy
Search for other works by this author on:
Stefano OMBONI;
Stefano OMBONI
†Istituto Scientifico Ospedale S. Luca, Istituto AuxologicoItaliano, Milan, Italy
Search for other works by this author on:
Giuseppe MANCIA;
Giuseppe MANCIA
‡Clinica Medica, Universita di Milano, Ospedale S. Gerardo, Monza, Italy
Search for other works by this author on:
Ben P. M. IMHOLZ;
Ben P. M. IMHOLZ
§TNO BiomedicalInstrumentation, Academic Medical Centre, Amsterdam, The Netherlands
Search for other works by this author on:
Karel H. WESSELING;
Karel H. WESSELING
§TNO BiomedicalInstrumentation, Academic Medical Centre, Amsterdam, The Netherlands
Search for other works by this author on:
Marco DI RIENZO
Marco DI RIENZO
*LaRC, Centro di Bioingegneria, Fondazione Don C. Gnocchi and Politecnico di Milano, via Gozzadini 7, I-20148 Milan, Italy
Search for other works by this author on:
Publisher: Portland Press Ltd
Received:
December 02 1998
Revision Received:
March 12 1999
Accepted:
April 16 1999
Online ISSN: 1470-8736
Print ISSN: 0143-5221
The Biochemical Society and the Medical Research Society © 1999
1999
Clin Sci (Lond) (1999) 97 (2): 129–139.
Article history
Received:
December 02 1998
Revision Received:
March 12 1999
Accepted:
April 16 1999
Citation
Paolo CASTIGLIONI, Gianfranco PARATI, Stefano OMBONI, Giuseppe MANCIA, Ben P. M. IMHOLZ, Karel H. WESSELING, Marco DI RIENZO; Broad-band spectral analysis of 24 h continuous finger blood pressure: comparison with intra-arterial recordings. Clin Sci (Lond) 1 August 1999; 97 (2): 129–139. doi: https://doi.org/10.1042/cs0970129
Download citation file:
Sign in
Don't already have an account? Register
Sign in to your personal account
You could not be signed in. Please check your email address / username and password and try again.
Captcha Validation Error. Please try again.