Picrosirius-red staining of collagen, reticulin staining of cardiomyocyte membranes, and CD31 immunostaining of capillaries.

Representative sections of left ventricular biopsies from coronary artery bypass graft surgery patients stained with picrosirius-red demonstrating interstitial and perivascular fibrosis (stained red) and arteriolar dimensions (A), reticulin stain demonstrating cardiomyocyte membranes (B), and immunostained for CD31 demonstrating capillaries (C).