Pre-Procedural Vascular Phenotyping Is Associated with Radial Artery Functional Impairment After Transradial...

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Vascular Biology

Background:

• Transradial access (TRA) is the preferred method for coronary catheterization.
• The long-term effects of TRA on radial artery vasoreactivity and hemodynamics are not fully understood.
• Quantifying TRA-induced functional impairment and its clinical predictors is crucial for patient outcomes.

Purpose of the Study:

• To prospectively assess TRA-induced functional impairment in the radial artery.
• To identify clinical determinants of this impairment.
• To investigate the association between baseline vascular parameters and post-procedural outcomes.

Main Methods:

• Prospective study of 94 patients undergoing elective TRA.
• High-resolution Doppler ultrasound assessed nine vascular parameters at baseline, 24 hours, and one month.
• Measured parameters included flow-mediated dilation (FMD), nitroglycerin-mediated dilation (NMD), peak systolic velocity (PSV), resistive index (RI), and lumen diameter.

Main Results:

• Significant declines in FMD and NMD at 24 hours, with incomplete recovery at one month.
• Radial artery lumen diameter remained reduced at one month; PSV and RI showed distinct recovery patterns.
• Female sex was linked to greater NMD reduction, while older age correlated with impaired FMD recovery.

Conclusions:

• TRA induces persistent, multidomain functional impairment of the radial artery one month post-procedure.
• Endothelial and smooth muscle functions exhibit different recovery trajectories.
• Baseline vascular characteristics and patient demographics (sex, age) predict post-TRA outcomes, suggesting a role for pre-procedural phenotyping in risk stratification.