[The surgical procedure in an anomalous muscular bundle of the right ventricle combined with an interventricular heart septal defect].

A defect of the interventricular septum (DIVS) in the perimembranous zone can be a source of reversible (hypertrophy) and irreversible (fibrous degeneration) alterations of the moderator band (MB), normally or abnormally located in the right ventricle of the heart. DIVS goes with changes of MB in 7,27% of the cases. Operations are necessary in combinations of DIVS with changes of MB. Surgical correction is indicated to patients with DIVS and the abnormal muscular band. Operative treatment should not be used for the compensatorily hypertrophic MB, located normally or abnormally.