Post-mortem histopathology with correlating MR images in four patients with ARVC. (A and B) Patient 2: Right ventricular outflow tract showing established focal fibrosis. Movat pentachrome stain, 10x objective. Sagittal thoracic MR b-FFE image demonstrating marked RVOT dilatation. (C and D) Patient 10: Interventricular septum showing extensive fatty infiltration and fibrosis with associated loss of myocytes. H&E stain, 2x objective. Oblique axial 3-d whole heart MR image demonstrating marked RV and RA dilatation. (E and F) Patient 11: Right ventricular outflow tract showing established fibrosis and fatty infiltration. Movat pentachrome stain, 10x objective. Basal short axis b-FFE MR image demonstrating severe RV dilatation. (G and H) Patient 15: Right ventricular outflow tract showing focal fibrosis, scanty lymphocytic infiltrate and extensive fatty infiltration. H&E stain, 10x objective. 4-chamber b-FFE MR image demonstrating moderate RV dilatation.