Evaluation of cardiac tissue in fibrosis in infarct zone. Two months after coronary artery ligation, staining with hematoxylin/eosin demonstrated in animals (A) that received or (B) did not receive growth factors similar scar aspects composed of paucicellular, dense, fibrous tissue; the digital image analyzer software, LUCIA, allowed a similar ratio of cardiac tissue (dark pink) included in fibrosis (slight pink) to be calculated.