fig2

Figure 2. Atrial amyloidosis. Courtesy of Professor Rossana Bussani, MD, Institute of Pathological Anatomy and Histology, University of Trieste, Italy. Congo Red staining revealed amyloid infiltration extending to interstitial space (blue arrows) and vessel walls (black arrows) including the sinoatrial nodal artery. A focus at 40× (bottom left) shows a cardiomyocyte (green arrow) surrounded by amyloid deposits. Scale bar, 500 μm.