Altered Hand Temperatures Following Transradial Cardiac Catheterization: A Thermography Study.

Background: There is concern about potential detrimental effects of transradial access (TRA) on radial artery structure, endothelial and hand function. This thermography study evaluated TRA impact on hand microvascular perfusion.

Methods And Results: We prospectively measured hand thermography, radial and ulnar artery size and blood flow velocities in both catheterization and non-catheterization hands at baseline and 30-days after TRA in 158 patients. There were no differences in radial or ulnar arterial diameters or velocities pre- and post-TRA in catheterization and non-catheterization hands (p = NS). The absolute total hand thermography values post-TRA were increased in both catheterization and non-catheterization hand (pre-TRA 30.4 ± 2.9 vs. post-TRA 31.6 ± 2.6 p < 0.01; pre-TRA 30.2 ± 2.9, post-TRA 31.6 ± 2.6 p < 0.01, respectively). After ulnar artery occlusion, hand temperatures decreased in both catheterization and non-catheterization hands, both pre- and post-TRA and were similar in the catheterization and non-catheterization hands (p = NS). Total hand temperature decreased with ulnar artery occlusion and was significantly attenuated post-TRA (p < 0.001 both catheterization and non-catheterization hands).

Conclusions: TRA is associated with temperature changes in both catheterization and non-catheterization hands at one month after the index procedure. These changes likely represent a systemic response to local TRA stimulus.