Anatomic abnormalities in transplant coronary vascular disease. Type A lesion: Discrete, tubular, or multiple stenoses. Type B1 lesion: Abrupt onset with distal diffuse concentric narrowing and obliterated vessels. Type B2 lesion: Gradual, concentric tapering with distal portion having some residual lumen. Type C lesion: Narrowed irregular distal branches with terminations that are often nontapered and squared off, ending abruptly.
Reproduced from: Gao SZ, Alderman EL, Schroeder JS, et al. Accelerated coronary vascular disease in the heart transplant patient: coronary arteriographic findings. J Am Coll Cardiol 1988; 12:334. Illustration used with the permission of Elsevier Inc. All rights reserved.