“…Despite a significantly lower incidence of wound infection rates 1 and compelling evidence that there is no difference in the degree of preservation of histologic architecture, vascular tone, or vasomotor reactivity of veins harvested with the Mayo dissector (Johnson and Johnson, Langhorne, PA) and a similar graft patency compared with the open method, 2 use of the Mayo dissector still remains limited, probably because of a lack of evidence regarding the functional quality of the vein. In modern practice, although endoscopic vein harvest is gaining popularity, the Mayo dissector (Figure 1) still remains a satisfactory and inexpensive, albeit underused, alternative for vein harvesting, and hence we sought to examine the functional quality of the veins harvested with the Mayo extraluminal dissector.…”