Sudden death in AC 30 years after his clinical presentation with chest pain (same patient as in Figure 3). At autopsy, the heart in cross section reveals diffuse biventricular involvement (A) with transmural fibro-fatty replacement of the RV free wall (B, trichrome staining ×3) and sub-epicardial mid-mural involvement of the LV free wall (C, trichrome staining ×3). AC, arrhythmogenic cardiomyopathy; LV, left ventricle; RV, right ventricle.