The bypass conduit with the highest patency rate is the:a. Radial artery
The most important criterion in conduit selection is graft patency. The conduit with the highest patency rate (98% at 5 years and 85-90% at 10 years) is the internal thoracic artery which is most commonly left attached proximally to the subclavian artery (although occasionally used as a free graft) and anastomosed distally to the target coronary artery. The use of both internal thoracic arteries has been shown to increase event-free survival in a number of studies.