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Background: Atrial septal defect and its closure can lead to changes in the right and left cardiac cavities' function and size. In this study, Z-scores of the cardiac chambers and the heart function were assessed, and the important complications were mentioned. Methods: This interventional cross-sectional study was done on patients who had atrial septal defect closure aged younger than 18 years. All patients were recruited for transthoracic echocardiography. About half of the patients were randomly selected. The information of angiography and its side effects belong to all patients, but the echocardiographic parameters and Z-scores belong only to the selected group. Results: A total of 370 patients underwent the atrial septal defect closure, of whom 150 patients participated in the study. The patients' average age and weight were 9.25 ± 3.44 years and 15.12 ± 11.83 kg, respectively, and the mean follow-up time was 2.56 years. Z-scores of the interventricular septal dimension in diastole, the left ventricular posterior wall dimension in diastole, the left ventricular internal dimension in systole, and Z-scores of the size of the right atrium, right ventricle, pulmonary valve annulus, and the main pulmonary artery were more than Z-scores of the normal population. Furthermore, Z-scores of the E/A and the Eat/Aat of the tricuspid valve were less than their peers. Besides, the correlation between Z-scores and the atrial septal defect size and weight of the patients was assessed, which was statistically significant, and patients who underwent atrial special defect closure at the age of fewer than three years and less than 15 kg had more normal cardiac Z-scores. Conclusions: Z-scores of the cardiac chambers and pulmonary artery were more than normal after successful closure of the atrial septal defect in the mid-term follow-up.

iranian journal of pediatrics

Remodeling Process in the Right and Left Atria and Ventricles Following Percutaneous Closure of the Atrial Septal Defect in Children and Adolescents: A Mid-term Study