“…With the LSV, Calligaro et al 22 in 1997 and Weaver et al 23 in 1987 reported secondary patency rates of 34% at 2 years and 60% at 3 years, respectively. In a series of 133 bypasses with UEV and LSV, Gentile et al 24 reported a 5-year assisted primary patency rate of 72%. Despite these astounding results, UEV and LSV are rarely used for below-knee revascularization because of either long and tedious harvesting or poor quality.…”