Pathophysiology of saphenous vein valves in coronary artery bypass with composite arteriovenous grafts

We read with interest the editorial by Hwang et al. (1). Initially, we would like to congratulate the authors for the manuscript, and for the continuous interest in improving the use of composite grafts with the saphenous vein (SV), a surgical technique that we have also used for more than 20 years and which, in selected cases, we believe is a safe and effective approach in coronary artery bypass graft surgery (CABG) (2)