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Updated: Jun 2, 2026

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
08:42

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research

Published on: October 22, 2014

Impaired endothelium independent vasodilation in nonobstructive hypertrophic cardiomyopathy

Francesco Bartolomucci1, Mario De Michele, Michaela Kozàkovà

  • 1Cardiology Division, Andria Hospital, Bat, Italy. francescobartolomucci@virgilio.it

American Journal of Hypertension
|April 22, 2011
PubMed

Insights

Patients with hypertrophic cardiomyopathy (HCM) exhibit impaired systemic conduit artery function, specifically a reduced response to nitroglycerin. This suggests underlying vascular wall remodeling or smooth muscle cell dysfunction in HCM patients.

Area of Science:

  • Cardiovascular Medicine
  • Vascular Biology
  • Cardiomyopathy Research

Background:

  • Hypertrophic cardiomyopathy (HCM) is associated with generalized vascular dysfunction, including microvascular abnormalities.
  • Previous research on conduit artery involvement in HCM is limited and conflicting.
  • This study investigates functional changes in conduit arteries of HCM patients.

Purpose of the Study:

  • To assess endothelium-dependent vasodilation (EDV) and endothelium-independent vasodilation (NEDV) in brachial arteries of HCM patients.
  • To determine if HCM affects systemic conduit artery function.
  • To compare vascular function in HCM patients with normotensive and hypertensive controls.

Main Methods:

  • High-resolution ultrasound was used to measure EDV (flow-mediated dilation) and NEDV (nitroglycerin response) in the brachial artery.
  • Participants included newly diagnosed, untreated patients with nonobstructive HCM.
  • Control groups comprised normotensive healthy subjects and untreated hypertensive patients with left ventricular hypertrophy.

Main Results:

  • HCM patients demonstrated significantly blunted NEDV compared to normotensive controls (13 ± 6% vs. 23 ± 7%, P < 0.01).
  • No significant difference in EDV was observed between HCM patients and normotensive controls (11 ± 4% vs. 13 ± 4%, P = 0.25).
  • Hypertensive controls showed significantly decreased NEDV and EDV compared to normotensives.

Conclusions:

  • Systemic conduit arteries in HCM patients exhibit a reduced vasodilator response to nitroglycerin.
  • This finding suggests potential vascular wall remodeling or smooth muscle cell dysfunction in HCM.
  • Conduit artery dysfunction may be a component of the generalized vascular abnormalities seen in hypertrophic cardiomyopathy.
Abstract

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