The endothelial integrity was assessed with immunohistochemistry in residual SVG. SVG was obtained with a conventional (CV) or no-touch (NT) approach during CABG. Representative stains of vWF (red) and DAPI (blue) are shown in (a). The demarcated area shows a higher magnification. Scale bar, 200 μm. A summary is shown in (b). The relative intensity of vWF normalized with that of DAPI is indicated (n = 3). Data are expressed as mean ± SEM.