“…820,821 However, obstructive lesions are more likely to occur in SVGs (53% within 5 years, 76% at 5 to 10 years, and 92% at greater than 10 years), 822 and there is a high rate of early graft failure in current practice (occlusion in up to one third at 1 year). Spasm in grafts or native vessels 823,824 and technical complications may also play a role in the development of UA/NSTEMI during the early postoperative period. 815,825 Both angioscopic and angiographic findings indicate that SVG disease is a serious and unstable process.…”