Myocarditis - an inflammatory lesion of a cardiac musle. Classification. On an etiology distinguish myocardites: rheumatic, infectious (infectious allergic, parainfectious and metainfective), bound with virus, bacteriemic, rickettsial and other infections; allergic (medicinal, serumal, postvaccinal, at a bronchial asthma, etc.); myocardites at systemic illnesses of a connecting tissue, parasitogenic infections, a sarcoidosis, traumas, combustions, influence of an ionizing radiation; an acute isolated myocarditis of the obscure etiology. On prevalence of a lesion of a myocardium distinguish a focal and diffusive myocarditis. Current of disease can be acute (duration till 3 months), under acute (duration of 3-6 months) and chronic (recurring). In a pathogenesis of a myocarditis the leading part in most cases belongs to various allergic and immunologic shifts.

Signs, current. The infectious allergic myocarditis (the most widespread form of not rheumatic myocarditis) begins unlike rheumatic, as a rule, on a background of an infection (more often - virus) or soon after it. The malaise, a long pricking pain in the field of heart, palpitation and "faults" in work of heart, the dyspnea, in some cases the moderate joint pain are marked. A body temperature more often subfebrile or normal. The beginning of disease can be hidden.