Hemodynamics of In Situ Saphenous Vein Arterial Bypass

Abstract
• Doppler-derived blood flow velocity and limb blood preshemosure measurements were used to characterize the hemodynamics of 128 in situ saphenous vein arterial bypasses. The magnitude and configuration of the graft velocity waveform was the best predictor of clinical outcome. Successful bypasses had antegrade flow throughout the pulse cycle and a blood flow velocity above 40 cm/s. A low graft blood flow velocity (Arch Surg 1988;123:477-482)