Flow-Mediated Vasodilation

**Semantic type:** Qualitative Concept

**Definition:** The percent change in arterial vessel diameter in response to an increase in blood flow caused by mechanical or chemical stimuli, which is usually measured using ultrasound-based methods. This measurement can reflect the functionality of the endothelium in the observed blood vessels.

**Synonyms:** - FMD - Flow-Mediated Vascular Reactivity