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Endothelial dysfunction in normotensive Chinese with a family history of essential hypertension

Li-Jun Li1, Shu-Ren Geng, Cheuk-Man Yu

  • 1Second Hospital, Xi'an Jiaotong University, Xi'an, PR China. lilijun3162003@yahoo.com.cn

Clinical and Experimental Hypertension (New York, N.Y. : 1993)
|March 19, 2005
PubMed

Insights

Endothelial dysfunction, a precursor to essential hypertension, is present in normotensive individuals with a family history of the condition. This impairment worsens as hypertension progresses.

Area of Science:

  • Cardiovascular Medicine
  • Vascular Biology
  • Hypertension Research

Background:

  • Essential hypertension is associated with endothelial dysfunction, but its role prior to disease onset is unclear.
  • Investigating endothelial function in genetically susceptible individuals is crucial for understanding hypertension development.
  • Early detection of endothelial dysfunction may allow for timely intervention.

Purpose of the Study:

  • To determine if endothelial dysfunction precedes essential hypertension in genetically vulnerable individuals.
  • To assess if endothelial dysfunction severity correlates with essential hypertension progression.
  • To differentiate between endothelium-dependent and independent vasodilation in relation to hypertension risk.

Main Methods:

  • High-resolution vascular ultrasound assessed brachial artery diameter changes.
  • Measurements included rest, reactive hyperemia (flow-mediated), and nitroglycerin response (non-flow-mediated).
  • Study included 58 subjects: 18 essential hypertensives, 20 normotensive with hypertension family history, and 20 healthy controls.

Main Results:

  • Flow-mediated dilation was significantly reduced in both hypertensive patients and normotensive individuals with a family history of hypertension compared to controls.
  • Non-flow-mediated vasodilation in response to nitroglycerin showed no significant differences among the groups.
  • Endothelium-dependent vasodilation was impaired in individuals at genetic risk for hypertension and further diminished in established hypertension.

Conclusions:

  • Endothelial dysfunction is an early finding in individuals predisposed to hypertension.
  • Impaired endothelium-dependent vasodilation is a risk factor for developing essential hypertension.
  • The severity of endothelial dysfunction increases with the progression of essential hypertension.

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