Myocarditis can be described as rheumatoid or Baby. The many errors allowed if SCR glomerulonefritom symptoms. In such cases is diagnosed only resort. SCR most often differentiate from rheumatism, endocardita infection, chronic active hepatitis (HAG), haemorrhagic diatezov (trombozitopenicesco purpura), other diseases from the group DZST. The differentiation in a condition usually among adolescents and boys in the debut of the disease, in case of arthritis and fever. Rheumatoid arthritis is different from volchanerngo more acute manifestations defeat Most major joints, skoroternstew. It should not be given diefferencialno-diag osticeski of the previous infection (bait), as it may be a nonspecific factor of the appearance of clinical signs SCR. Diagnosis rheumatism is credible, since there is no evidence against heart (revmocardit), the subsequent dynamic observation reveals emerging heart disease, while hard, and if there is a lack of mitral valve, it was not without distinct gemodinamicakih violations mitralnaya regurgitation expressed nerezko. Unlike hard in the acute stage of the spinal leucocytosis, Le-kletki, ANF is not found. Difference between diagnosis and SCR Rheumatoid Arthritis difficult in the early stages of the disease because of the similarities of clinical symptoms : symmetric defeat small joints hand, the involvement of new joints, the availability of the "morning constraints." Differentiation based on the dominance of the revmatoidnom arthritis in the affected joints proliferativogo component early wasting muscles, resulting in the affected joints, and resistance cords losses. Erosion joint surfaces lacking in facilities, but are common symptoms of rheumatoid arthritis. Rheumatoid factor (RF) in the high epidemiologist characteristic of rheumatoid arthritis, with hard it is rarely found in low epidemiologist. It is difficult differential diagnosis and SCR viszeralna of rheumatoid arthritis. Facilitating factor is that the precise diagnosis in both cases does not affect the nature of the treatment (korticosteroidnaya therapy). The HAG can develop systemic manifestations in the form of fever, arthritis, plevrita, skin vsapani, glomerulonephritis; Can be detected lakopenia, thrombocytopenia, Le-kletki, ANF. Differentiation should be taken into account.