[Demons-Meigs syndrome or cardiomyopathy: a difficult case of a differential diagnosis].

The article presents an overview of the data related to Demons-Meigs syndrome and the clinical situation associated with a complex differential diagnosis between myocarditis with the formation of secondary cardiomyopathy and Demons-Meigs syndrome. A variety of clinical symptom complexes that are associated with Demons-Meigs syndrome is discussed. The concepts of classical and non-classical, full and incomplete Demons-Meigs syndrome are considered. The current views on the pathogenesis of the syndrome and the mechanism of the formation of ascites and pleural effusion are given.