Abstract
Atrial Septal Defect (ASD) is an acyanotic congenital heart disease where there is an abnormality in the septum that divides the right atrium and left atrium. When the fetus develops in the uterus, a septum forms dividing the atrial space into the right and left atrium. However, if the septum is not formed completely it will cause abnormalities at birth, namely ASD. Transthoracic echocardiography is recommended in diagnosing ASD with demonstration of interatrial diseptal shunting because it can provide the imaging information necessary to establish a diagnosis of ASD and make an informed clinical decision. The aim of this study was to determine the values of EF, TAPSE, PH, TR and dilatation of the heart chambers pre and post ASO installation in ASD patients. This research uses a descriptive qualitative approach with a case study type of research. The sample used in this research consisted of one patient. The results of the study showed that the results of the EF and TAPSE examinations did not show any influence, the severity level of PH was high probability of PH, there was a decrease in the TR severity value, and there was dilatation pre and post ASO installation in ASD patients.
