Figure 5 Histology of Left Ventricular Aneurysm The microscopic findings of the patient’s resected aneurysm  (A : hematoxylin and eosin stain,  B:  Movat pentachrome stain, original magnification ×40). There is severe interstitial fibrosis (eosinophilic in  A ,  yellow in B ) which nearly replaces the compact zone of the myocardium. The Movat shows minimal elastosis of the endocardium (black fibers). The fibrosis affects the subendocardial layer and trabecular muscle, which are typically spared in ischemic injury.