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  • Title: Histopathological criteria of myocarditis--a study based on normal heart, chagasic heart and dilated cardiomyopathy.
    Author: Higuchi Mde L, De Morais CF, Sambiase NV, Pereira-Barretto AC, Bellotti G, Pileggi F.
    Journal: Jpn Circ J; 1990 Apr; 54(4):391-400. PubMed ID: 2398619.
    Abstract:
    This work is a detailed study of the relevance of three sets of criteria to define myocarditis: Dallas meeting criterion, Edwards criterion and Dallas meeting criterion modified by the authors. Two groups were evaluated: normal autopsied hearts and endomyocardial biopsy from chronic chagasic patients at high risk of having myocarditis. Furthermore, endomyocardial biopsies from patients with dilated cardiomyopathy (DCM) were also evaluated. Applying the Edwards criterion, incidences of myocarditis in normal and chagasic hearts were 0% and 67% while with Dallas meeting criterion they were 0% and 42% and using our criterion the incidences were 0% and 92% respectively. In endomyocardial biopsies from DCM patients, the incidence of myocarditis was 7% with Edwards criterion, 22% with Dallas meeting and 33% with the authors own criterion. The authors concluded that their criterion, which defines myocarditis as the presence of inflammatory mononuclear cells enclosing more than 2 lymphocytes/400X aggregated to the cardiac fiber sarcolemma, is the most appropriate criterion of the three. Myocarditis was found in 33% of the 27 endomyocardial biopsy specimens from patients with DCM.
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