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Study identifier: NCT06939153 Synced from ClinicalTrials.gov · July 28, 2026
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Effects of Age, Sex and Isometric Exercise on Ventricular-Vascular Interactions During Cardiac Unloading

Condition: Orthostatic Intolerance  ·  Sponsor: Tracy Baynard

PhaseNA
Planned participants64
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersYes

About this study

As people get older, especially women, they often feel dizzy or even faint when they go from sitting or lying down to standing up. This happens because their blood pressure (BP) drops, which can lead to falls, heart problems, and even death in older adults. When BP changes, it affects how well the heart works and how it talks with blood vessels. However, little research has been done on how the heart and blood vessels talk during times of low BP. The crosstalk between the heart and blood vessels is important, as it allows enough blood and oxygen to reach the brain and other vital organs. Some research shows that as we get older, the crosstalk does not work as well. This can make it harder for blood to flow properly or put extra pressure on the heart and arteries. That's why we want to study how the heart and blood vessels talk during a laboratory-simulated situation of low BP in young and older men and women. In our study, participants will lie down with their lower body in a chamber that creates a vacuum around their legs. This safely mimics what happens when you stand up quickly. We can then measure heart function, the stress on arteries, and BP while your legs are in that vacuum. We'll use an ultrasound to check the heart and a finger cuff to measure BP. We'll also see if gripping something firmly can help protect from sudden drops in blood pressure. This study will help us understand more about a condition called orthostatic hypotension and might even suggest that handgri…

This description comes directly from the study's public registry record.

Talk to the study team

João L. Marôco, MS  ·  7738933897  ·  joao.maroco001@umb.edu

Tracy Baynard, PhD  ·  12178404493  ·  tracy.baynard@umb.edu

Always discuss trial participation with your own doctor first.

Locations (1)

University of Massachusetts BostonBoston, Massachusetts, United StatesRecruiting

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Source record: clinicaltrials.gov/study/NCT06939153