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When the incidence of myocarditis is similar in the arrhythmia and DCM subgroups, the viral genome detection rate is statistically significantly higher in DCM. Among the non-invasive markers, an ACA set (high sensitivity and specificity) is of the greatest diagnostic value in the diagnosis of myocarditis. The diagnostic rule based on counting the number of scores has been developed, which makes it possible to individually establish the risk of myocarditis in patients with idiopathic arrhythmias and DCM for both the determination of indications for biopsy and the lack of the possibility of its performance. The risk of myocarditis is high if there are 5-7 scores; that is close to 100% if there are 8 scores or more.

The goal is to present the possibilities of diagnosis verification, the features of the clinical picture of tuberculous pericarditis in the therapeutic clinic and the results of its treatment. Materials and methods. The paper presents clinical observation and a general analysis of 10 cases of tuberculous pericarditis in patients aged 31-79 (mean age 58.0 ± 15.1 years), 6 women and 4 men. Diagnostic puncture pericardium was performed on two patients, pleural puncture - on three Thoracoscopic biopsy of hilar lymph nodes and lung (n=1), pleura (n=1), supraclavicular lymph node biopsy (n=1). Dyskin test was carried out, as well as sputum examination, multispiral computed tomography, oncological search. Results. A 31-year-old patient with a massive effusion in the pericardial cavity, pleural lesion, arthritis of the left knee joint, whose results of the pericardial effusion and sputum were not diagnosed, tuberculosis was detected only with thoracoscopic biopsy of the lung and intrathoracic lymph nodes; the treatment via prednisolone and subtotal pericardectomy was performed. Among 10 patients with MSCT of the lung, changes were noted in general, but in only one case they were highly specific. Diaskin test is positive in 70%. In the study of punctata, bronchoalveolar flushing, Koch bacteria were not detected; at sputum in microscopy and biological sample BC was detected in two patients. The lymphocytic character of effusion in the pericardium / pleura is noted in 4 out of 5 cases. At a biopsy of lymphonoduses and a lung at 2 patients the picture of a granulomatous inflammation with a caseous necrosis. Pericarditis was predominantly large (from 2 cm and more) effusion, signs of constriction were noted in 50% of patients. Conclusion. Tuberculosis is one of the frequent causes of pericarditis in the Moscow therapeutic clinic. The most lymphocytic effusion with fibrin and the development of constriction. The negative results of all laboratory tests for tuberculosis do not exclude a diagnosis, It is necessary to use invasive morphological diagnostics, including thoracoscopic biopsy.