Amyloid P Immunohistochemistry in Myocardial Amyloidosis: Comparison With Congo Red

Amyloid refers to a family of abnormal proteins that share a common fibrillar β-pleated sheet structure that gives it unique optical and staining properties. In addition to the fibrillar component, amyloid deposits contain a universal amyloid P component. Detection of amyloid in myocardial tissue with Congo red alone is difficult and tedious. We evaluated …