Profiling the endothelial function using both peripheral artery tonometry (EndoPAT) and Laser Doppler Flowmetry (LD)...

Area of Science:

• Cardiovascular Research
• Biomedical Engineering
• Clinical Diagnostics

Background:

• Endothelial dysfunction (ED) is a critical factor in cardiovascular disease development and a predictor of events.
• Current methods like ultrasound-flow-mediated-dilation have operator-dependent limitations.
• There is a need for reliable, operator-independent methods to assess endothelial function in the general population.

Purpose of the Study:

• To compare the operator-independent methods EndoPAT and Laser Doppler flowmetry (LD) for assessing endothelial function.
• To evaluate the correlation of EndoPAT and LD with biochemical cardiovascular risk markers and endothelial activation markers.
• To determine the utility of these methods in cardiovascular risk stratification.

Main Methods:

• Investigated 61 healthy subjects (aged 29 ± 1 years).
• Collected blood for conventional cardiovascular risk markers, NO-pathway metabolites, oxidative stress markers, and endothelial/platelet activation markers.
• Assessed endothelial function using both EndoPAT and Laser Doppler flowmetry.

Main Results:

• A poor correlation was observed between EndoPAT and LD results.
• No significant differences in endothelial activation or cardiovascular risk markers were found between participants with preserved versus impaired endothelial function.
• Both methods assessed endothelial function independently of endothelial pro/anti-inflammatory status and conventional risk factors.

Conclusions:

• EndoPAT and LD show poor agreement in assessing endothelial function.
• These methods currently assess endothelial function independently of established risk profiles.
• Further prospective studies are required to validate their role in cardiovascular risk stratification.