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Assessing Endothelial Vasodilator Function with the Endo-PAT 2000
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Published on: October 15, 2010

Endothelial dysfunction in normotensive salt-sensitive subjects.

F-Q Liu1, J-J Mu, Z-Q Liu

  • 1Cardiovascular Department, First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, PR China.

Journal of Human Hypertension
|February 25, 2011
PubMed
Summary
This summary is machine-generated.

Normotensive salt-sensitive individuals exhibit endothelial dysfunction, indicated by lower flow-mediated dilation and plasma nitric oxide levels. This dysfunction may explain increased organ damage and mortality in salt-sensitive subjects.

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Published on: October 22, 2014

Area of Science:

  • Cardiovascular Medicine
  • Renal Physiology
  • Vascular Biology

Background:

  • Salt-sensitivity is linked to severe organ damage and mortality, even in individuals with normal blood pressure.
  • Endothelial dysfunction is a known predictor of future cardiovascular events.

Purpose of the Study:

  • To investigate if normotensive salt-sensitive (NSS) individuals display more pronounced endothelial dysfunction compared to normotensive salt-resistant (NSR) individuals.

Main Methods:

  • 99 normotensive adults in China underwent a salt intervention (high to low salt diet).
  • Salt sensitivity was defined by a ≥10% increase in mean blood pressure.
  • Endothelial function was assessed via brachial artery flow-mediated dilation (FMD) and plasma/urine nitric oxide (NOx) levels.

Main Results:

  • NSS subjects showed significantly lower FMD (10.2±2.5% vs. 14.5±1.6%, P=0.037) and plasma NOx levels (61.2±3.23 μM vs. 82.5±1.61 μM, P=0.034) compared to NSR subjects.
  • Both FMD and plasma NOx levels were negatively correlated with the degree of salt sensitivity (r=-0.435 and r=-0.459, respectively, P<0.01).
  • No significant difference in urine NOx levels was observed between the groups.

Conclusions:

  • Normotensive salt-sensitive individuals exhibit endothelial dysfunction.
  • This dysfunction, characterized by impaired flow-mediated dilation and reduced plasma nitric oxide, may contribute to the increased target organ injury and mortality associated with salt sensitivity.