The ninth volume of this practical guide continues the topic of the diagnosis of cardiovascular diseases and is devoted to topical issues of the diagnosis of pericarditis, infective endocarditis, mitral valve prolapse and acquired heart defects. Contains the most up-to-date information on the etiology, pathogenesis, classification, criteria for the diagnosis and differential diagnosis of these diseases. The relevant sections of the MKB-10 are attached. For therapists, cardiologists and doctors of other specialties.