Collagen accumulation and resorption during GD ventricular remodeling following cauterization. (A) Trichrome stained heart of GD showing minimal presence of collagen (blue fibrils) in the non-injured heart. Accumulation of collagen increases at (B) 7 days, (C) 14 days, and decreases (D) at 45 days. (E, F) Collagen fibril bundles (arrowheads) running in multiple directions adjacent to fibroblasts (Fb) and myocytes (M) within injured GD ventricle at 14 days. (G) Quantification of aniline blue stained collagen fibrils in trichrome stained section in injured and non-injured areas, and (H) in injured area normalized to ventricular area. (Scale bar A–D, 50 um; scale bar E–F, 1 um)