[Characteristics of isolated cardiomyocytes of the left regions of the human heart in hypertrophy].

Study of the DNA content in nuclei and of the number of polynuclear cardiomyocytes in the left auricula atrii and the left ventricle wall in the operation and biopsy material of patients with mitral valvular disease showed hypertrophy to be accompanied by polyploidization and division of the nuclei as well as division of cardiomyocytes themselves.