In the Department of Surgery for Congenital Heart Defects, surgical correction of abnormal pulmonary vein drainage was performed in 221 patients. Echocardiographic examination was performed in all 221 (100%) operated patients before correction and in 119 (53.85%) patients in the long term after surgery. The comparative results of echocardiography with preoperative data obtained in 119 patients in the period from 1 year to 10 (on average, 6.7±0.16) years were studied in this scientific study. At the same time, on the basis of Echocardiography, analyzing their own material, the authors tried to assess the adequacy of the performed operation. For this purpose, the echocardiogram was examined before and after surgery in the long term. The aim of the study was to study the dynamics of echocardiographic parameters in the long term after surgical treatment of abnormal possession of pulmonary veins.