Improving the visual field in coronary artery by with non-obstructive angioscopy: dual infusion method

This study examines visual field expansion by a dual infusion method, which involves an infusion from the probing and guiding catheters, and the relationships between visual grade and vessel characteristics. Thirty-two patients and thirty patients performed coronary plaque analysis with NOA using the conventional method and the novel dual infusion method, respectively. Images were blindly analyzed retrospectively. Visual fields were assessed from image slices using a 5-point scale (0  = invisible, 1 = poor, 2 = adequate, 3 = good, 4 = excellent) at 5-s intervals. The relationships between visual grade and vessel characteristics were analyzed using multiple stepwise linear regression analysis. The mean visual grade, “excellent” ratio, and “adequate” ra tio were significantly higher using the dual infusion method than those obtained using the conventional method (p = 0.003, p = 0.004, and p = 0.005 respectively). The “invisible” ratio was significantly lower using the dual infusion method than the conventional method (p = 0.027) . The visual field was negatively associated with the conventional method (β  = −0.154, p <  0.001), large vessels (β = −0.004, p <  0.49), bifurcation (β  = −0.205, p <  0.001), vessels with a sharp angle (β  = −0.106, p <  0.001), in-stent (β = −0.180, p <  0.001), and distal border of stent (β  = −0.075, p <  0.0...
Source: The International Journal of Cardiovascular Imaging - Category: Radiology Source Type: research