Abstract
The string sign is a diffuse narrowing of arterial grafts used for surgical revascularization without significant stenosis of an anastomosis.1 It is an adaptation of the arterial graft as a function of myocardial demands and competitive flow. Arterial grafts can dilate and therefore increase their flow in response to increased metabolic demands of the myocardium, or when the degree of stenosis in the coronary increases and vice versa (Figure 1).2,3
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