Patent ductus arteriosus (PDA) is an orphan cardiopathy that results from the failure of the ductus arteriosus, a vessel which connects the pulmonary artery with the aorta in a newborn’s heart to close after birth.
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An atrial septal defect, commonly referred to as ASD, is a condition which occurs before birth in the heart when there is a hole in the wall that separates the two right chambers of the heart. Although it is possible that some minor defects will never become a problem and

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ASD stands for Atrial Septal Defect and it is also referred to as a septal patent foramen ovale or a unfix defect. In this type of patent ductus arteriosis, the gap in the atrial septum is larger and the defect is not located to the right of the right pulmonary artery while to the left of the left pulmonary artery as in the case with patent ductus arteriosis. ASD is closed during surgery
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