Key result
Head-up tilt testing produces reproducible changes in SV, MAP, and cerebral oxygenation versus supine rest.
Why the study?
Are the alterations in circulation and cerebral oxygenation from supine rest to head-up tilt reproducible in healthy individuals?
Population
10 healthy individuals
Comparison
Head-up tilt testing (70 degrees for 10 minutes) vs Supine rest (10 minutes)
Design
Other
Follow-up
Two different days
Authors
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Reproducibility of these measures in healthy subjects supports their use in research protocols; does not yet inform clinical practice.
Observational (n=10)
Are the alterations in circulation and cerebral oxygenation from supine rest to head-up tilt reproducible in healthy individuals?
Measurements of MAP by Portapres, SV by Modelflow, and HHb by NIRS during head-up tilt testing are reproducible and suitable for follow-up studies.
Houtman et al. (1999) conducted an observational in Healthy (n=10). Head-up tilt (HUT) vs. Supine rest (SUP) was evaluated on Reproducibility of alterations in stroke volume, mean arterial pressure, and cerebral oxygenation. Head-up tilt testing produced reproducible changes in stroke volume, mean arterial pressure, and deoxygenated hemoglobin concentration compared to supine rest in healthy individuals.
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