[Functiono-morphological principles of classification of mitral valve stenosis]

By correlating the functional classification of mitral stenosis proposed by A.N. Bakulev and E.A. Damir with the myocardial changes detected on the ECG in 282 patients operated on for mitral stenosis, it has been established that the hypertrophic process in the right ventricle at Stage IV of heart disease corresponds to the stage of wearing off and progressive cardiosclerosis. Heart disease of Stage III is associated with morphological alterations in the left atrium and the right ventricle of various severity. In developing a surgical classification of heart disease it is necessary to consider electrographically evident morphological changes in the heart.