Cardiology textbook "Heart Diseases in Questions and Answers" was prepared at the Department of Internal Medicine with a course of cardiology and functional diagnostics named after Academician V.S. Moiseev RUDN University and is intended for students, interns, residents, students of postgraduate education courses, cardiologists, therapists, general practitioners. The manual consists of two parts and contains modern information on the most common diseases of the heart and blood vessels in the practice of a modern doctor, including etiology, pathogenesis, clinical picture, classification, basic principles of diagnosis and treatment.