COVID-19 sequelae on transthoracic echocardiography findings in pediatric patients with septal congenital heart disease: A retrospective comparative analysis oleh Damirbek Abibillaev, Elmira Tukusheva, Akmaral Kurmanbekova, Begaiym Ulugbekova, Raushan Barakanova, Taalaibek Kudaiberdiev, Zhumagul Tashbolot kyzy, Kubra Abdulbakioglu, Azizakan Rakhmanova, Aidina Kazymbek, Kudaibergen Osmonaliev