Related Experiment Video
Updated: Jul 19, 2026
08:42
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
Gender differences in wall shear-mediated brachial artery vasoconstriction and vasodilation
J Levenson1, F Pessana, J Gariepy
1Centre de Médecine Préventive Cardiovasculaire, Institut National de la Santé et de la Recherche Médicale (INSERM), Hôpital Broussais, Paris, France. levenso@worldnet.fr
Journal of the American College of Cardiology
|November 13, 2001
Summary
Women exhibit greater shear-mediated arterial vasodilation and vasoconstriction than men, indicating distinct gender-related vascular tone regulation. This study assessed wall shear rate (WSR) and brachial artery diameter (BAD) changes simultaneously.
Area of Science:
- Cardiovascular physiology
- Vascular reactivity research
- Biomedical engineering for noninvasive assessment
Background:
- Simultaneous assessment of wall shear rate (WSR) and arterial reactivity is uncommon.
- Flow-mediated vasoconstriction is less studied than vasodilation in human arteries.
Purpose of the Study:
- To simultaneously investigate WSR and brachial artery diameter (BAD) changes.
- To identify potential gender differences in arterial reactivity.
Main Methods:
- Development of a novel noninvasive method for evaluating brachial artery WSR.
- Utilized a multigated, pulsed Doppler velocimeter with a robotic system.
- Validated the system in vitro, demonstrating high correlation (r = 0.98).
Main Results:
- Forearm occlusion induced significant vasoconstriction and vasodilation in response to low and high shear rates.
- Women showed a significantly higher slope of relative BAD vs. WSR changes compared to men (p < 0.01).
- Normalized arterial diameter per shear rate was greater in women for both vasoconstriction and vasodilation (p < 0.01).
Conclusions:
- Shear-mediated arterial vasodilation and vasoconstriction are more pronounced in women.
- Suggests gender-specific differences in the regulation of large artery vascular tone.
Related Concept Videos
01:21Sites for measuring blood pressure
Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
The Brachial Artery: Primary Site for Blood Pressure Measurement
The Brachial Artery: Primary Site for Blood Pressure Measurement
01:15Assessment of blood pressure in brachial artery(one-step method)
This procedural guide systematically measures blood pressure using an oscillometric digital sphygmomanometer, emphasizing accuracy, patient safety, and comfort.
Prepare for the Procedure:
Prepare for the Procedure:
01:23Assessment of blood pressure in brachial artery(two-step method)
Measuring blood pressure is a fundamental skill in healthcare that aids in diagnosing and monitoring hypertension and other cardiovascular conditions. An aneroid sphygmomanometer, commonly used in clinical settings, offers a manual and precise method for blood pressure measurement. The technique for using this instrument involves specific steps that must be carefully executed to ensure accuracy. The following detailed description outlines a two-step technique for assessing blood pressure using...
01:15Structure of Blood Vessels
Blood is circulated throughout the human body through a network of blood vessels called the circulatory system. This system includes arteries that transport blood from the heart to various body parts. These arterial pathways divide into smaller vessels until they reach the arterioles, which further split into capillaries. It is within these minuscule capillaries that the exchange of nutrients and waste products takes place. After this exchange, the blood is collected by venules, which fuse to...
01:16Arteries and Arterioles
Arteries, the vasculature responsible for transporting blood from the heart, possess robust walls capable of enduring the elevated pressures exerted by the heartbeat. Arteries near the heart are especially thick-walled and enriched with elastic fibers across their three tunics, classifying them as elastic or conducting arteries. These arteries, usually with a diameter exceeding 10 mm, are characterized by their ability to dilate in response to the blood pumped from the heart's ventricles and...
01:20Vascular Resistance
Vascular resistance is a critical concept in understanding blood flow dynamics in the circulatory system. It refers to the resistance that blood encounters as it flows through the blood vessels. This resistance is a key factor in determining blood pressure and cardiac workload.
The primary determinants of vascular resistance are vessel diameter, blood viscosity, and vessel length. Among these, vessel diameter plays the most significant role due to the fourth power relationship described by...
The primary determinants of vascular resistance are vessel diameter, blood viscosity, and vessel length. Among these, vessel diameter plays the most significant role due to the fourth power relationship described by...