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Pulse wave analysis is a reproducible technique for measuring central blood pressure during hemodynamic perturbations induced by exercise

Citation

Holland, DJ and Sacre, JW and McFarlane, SJ and Coombes, JS and Sharman, JE, Pulse wave analysis is a reproducible technique for measuring central blood pressure during hemodynamic perturbations induced by exercise, American Journal of Hypertension, 21, (10) pp. 1100-1106. ISSN 0895-7061 (2008) [Refereed Article]

DOI: doi:10.1038/ajh.2008.253

Abstract

Background: Central blood pressure (BP) and markers of wave reflection (augmentation index; AIx) measured by radial tonometry have prognostic value independent from brachial BP. The measurement of the central waveform is increasingly used during altered hemodynamics, including exercise, but reliability of the test has not been reported under changed loading conditions. This study aimed to test the technique's reproducibility during major hemodynamic perturbations induced by exercise. Methods: Radial waveforms were recorded (SphygmoCor) in 28 healthy subjects (aged 53 11 years) at rest, during submaximal exercise (cycling at 50, 60, and 70% of maximal age-predicted heart rate (HR)) and immediately after maximal treadmill exercise on two occasions separated by 9 5 days. Data were compared between testing days. Waveforms were calibrated with brachial BP measured using a mercury sphygmomanometer. Pulse pressure amplification (PPAmp) was defined as the ratio of brachial to central pulse pressure. Results: There was very good reproducibility between visits at all exercise intensities for all waveform measures, including AIx, central pulse pressure, and PPAmp (intraclass correlations at 50% exercise were 0.93, 0.89, and 0.89, respectively; P < 0.001). The mean difference between tests at this intensity was 0 4% for AIx, 4 6 mm Hg for central pulse pressure, and -0.02 0.09 for PPAmp. There were no significant differences between visits for HR, PPAmp, or AIx at rest or with exercise (P > 0.05 for all). Conclusions: Radial tonometry is a reproducible technique for measurement of central waveform indices during perturbations induced by exercise. It should, therefore, be suitable for use in intervention studies in which hemodynamics are altered.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Sharman, JE (Professor James Sharman)
ID Code:62701
Year Published:2008
Web of Science® Times Cited:63
Deposited By:Menzies Institute for Medical Research
Deposited On:2010-03-18
Last Modified:2010-05-03
Downloads:0

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