Figure 5: Pathology of coronary artery and myocardium at 30 d following of placebo treatment. Focal intimal thickening at the balloon treated region of the artery was evident (A and B). Black arrows in panel A and B indicate the intimal thickening. White arrows indicate a tear in the media and internal elastic lamina (Panel B). Myocardial fibrosis (indicated by black arrow), a typical finding of healing infarcts was present regardless of collagenase or placebo treatment (C, D). A=H& E stain, B=Movat stain, C=H& E stain, D=Movat stain.