Achieving haemodynamic baseline values with Finapres in elderly subjects during supine rest

Background: Clear guidelines for the resting time necessary to achieve stable blood pressure (BP) levels are scant in gerontology research. Therefore, we aimed to determine the minimum period required for obtaining haemodynamic baseline values in elderly subjects during supine rest. In addition, we...

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Published in:Clinical physiology (Oxford) 2000-11, Vol.20 (6), p.466-473
Main Authors: Mehagnoul-Schipper, D. Jannet, Van Kraaij, Dave J. W., Jansen, René W. M. M.
Format: Article
Language:English
Subjects:
Adaptation, Physiological - physiology
Aged
Aged, 80 and over
ageing
baseline measurement
Biological and medical sciences
blood pressure
Blood Pressure - physiology
Blood Pressure Determination
circulation physiology
Female
Finapres
finger arterial pressure
Fundamental and applied biological sciences. Psychology
Heart Failure - physiopathology
Heart Rate - physiology
Hemodynamics - physiology
Hemodynamics. Rheology
Humans
Male
Rest
Stroke Volume - physiology
Supine Position
Vertebrates: cardiovascular system
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Summary:Background: Clear guidelines for the resting time necessary to achieve stable blood pressure (BP) levels are scant in gerontology research. Therefore, we aimed to determine the minimum period required for obtaining haemodynamic baseline values in elderly subjects during supine rest. In addition, we evaluated the effect of cardiovascular morbidity, such as diastolic heart failure, and the effect of complex comorbidity of geriatric patients, on haemodynamic changes during supine rest. Methods: A total of 17 healthy subjects, 18 heart failure patients with normal systolic function and 24 geriatric patients, aged 70 years and more, participated. After an overnight fast, changes in systolic BP (SBP), diastolic BP (DBP), heart rate (HR), and stroke volume (SV) were determined by Finapres beat‐to‐beat non‐invasive BP monitoring during a 20‐min supine rest. The procedure was repeated in the healthy subjects and geriatric patients on a second day. Results: Complete BP stabilization was reached in each group within 5 min of supine rest, as SBP remained essentially unchanged and DBP did not change significantly anymore after the fourth minute. In the heart failure patients, HR decreased and SV increased until the twelfth minute of rest. The SBP, DBP, HR, and SV changes during supine rest showed good reproducibility. Conclusions: A span of 5 min of supine rest ensured achievement of reliable and reproducible baseline BP values by Finapres in elderly subjects. However, we recommend at least 12 min of rest to obtain full haemodynamic stability in elderly patients with diminished cardiac compliance and diastolic function.
ISSN:0144-5979
1365-2281
DOI:10.1046/j.1365-2281.2000.00286.x