Figure 5.

 Luminal narrowing as a function of plaque morphology. (A) Severe cross sectional luminal narrowing of > 75% is more common in acute and healed ruptures than in thin cap fibroatheromas (TCFAs). Note 74% of TCFAs showed luminal narrowing ⩽ 74%. (B) Cross sectional luminal narrowing in lesions with occlusive and non-occlusive thrombi; note lesions with occlusive thrombi demonstrate greater luminal stenosis. (C) The change in lumen size is plotted against the number of healed ruptures. While the percentage of stenosis gradually increases with 1–3 underlying healed ruptures, with four previous ruptures, there is a pronounced increase in luminal stenosis. Panel A is reproduced with permission from Virmani R, et al. J Interv Cardiol 2002;15:439–46.