A new method for the assessment of endothelial function with peripheral arterial volume

Area of Science:

• Cardiovascular Research
• Medical Technology
• Diagnostic Methods

Background:

• Assessing peripheral endothelial function is crucial for cardiovascular health.
• Current methods for measuring endothelial function can be invasive or complex.
• A need exists for noninvasive, automated techniques for routine assessment.

Purpose of the Study:

• To evaluate the potential of a novel reactive hyperemia peripheral arterial volume (RH-PAV) method for assessing peripheral endothelial function.
• To compare the RH-PAV method with the established brachial flow-mediated dilation (FMD) technique.

Main Methods:

• A novel oximeter-like probe was used to measure peripheral arterial volume (PAV) in the finger.
• The RH-PAV index was calculated as the ratio of digital pulse volume during reactive hyperemia to baseline.
• The RH-PAV method was compared with brachial FMD in 93 consecutive patients presenting with chest pain.

Main Results:

• A moderate linear relationship was observed between PAV and FMD (r=0.69, p<0.01).
• PAV was more impaired in patients with more cardiovascular risk factors, similar to FMD.
• Patients with coronary artery disease (CAD) exhibited lower PAV and FMD compared to those without CAD.

Conclusions:

• The RH-PAV method for assessing digital artery endothelial function shows similar patterns to brachial artery FMD.
• Hyperemia PAV was reduced by factors known to impair endothelial function.
• The RH-PAV technique holds potential as a novel, noninvasive method for studying endothelial function.