Small Cardiac Lesions--Fibrosis of Papillary Muscles and Focal Cardiac Myocytolysis

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  • STEER Arthur
    Department of Pathology, Radiation Effects Research Foundation
  • NAKASHIMA Teruyuki
    Department of Pathology, Kurume University School of Medicine
  • KAWASHIMA Taketsugu
    Department of Pathology, Radiation Effects Research Foundation
  • LEE Kelvin K.
    Department of Epidemiology and Statistics, Radiation Effects Research Foundation
  • DANZIG Michael D.
    Department of Medicine, Radiation Effects Research Foundation Surgeon U.S. Public Health Service.
  • ROBERTSON Thomas L.
    Department of Medicine, Radiation Effects Research Foundation Senior Surgeon, U.S. Public Health Service.
  • DOCK Donald S.
    Department of Medicine, Radiation Effects Research Foundation

書誌事項

タイトル別名
  • Small Cardiac Lesions
  • Small Cardiac Lesions Fibrosis of Papil
  • Fibrosis of Papillary Muscles and Focal Cardiac Myocytolysis

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Three types of small cardiac lesions were described and illustrated: (1) focal type of papillary muscle fibrosis, evidently a healed infarct of the papillary muscle present in 13% of the autopsies, is a histologically characteristic lesion associated with coronary artery disease and healed myocardial infarction, (2) diffuse type of papillary muscle fibrosis, prob-ably an aging change present in almost half of the autopsies, is associated with sclerosis of the arteries in the papillary muscle, is identifiable histologically, and apparently is not associated with any cardiac abnormality, and (3) focal cardiac myocytolysis, a unique histologic lesion, usually multifocal without predilection for any area of the heart, is associated with ischemic heart disease, death due to cancer complicated by nonbacterial thrombotic endocarditis and microthrombi in small cardiac arteries as well as with other diseases. Differentiation of the 2 types of papillary muscle fibrosis is important in the study of papillary muscle and mitral valve dysfunction. Focal cardiac myocytolysis may contribute to the fatal extension of myocardial infarcts.

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