Aortopulmonary Septal Defect

**Definition:** A developmental abnormality in which the spiral (aortopulmonary) septum failed to completely divide the TRUNCUS ARTERIOSUS into ASCENDING AORTA and PULMONARY ARTERY. This abnormal communication between the two major vessels usually lies above their respective valves (AORTIC VALVE; PULMONARY VALVE).

**Tree numbers:** - C14.240.400.560.098 - C14.280.400.560.098 - C16.131.240.400.560.098

**Synonyms:** - Aorticopulmonary Septal Defects - Aortopulmonary Septal Defects - Septal Defect, Aorticopulmonary - Septal Defect, Aortopulmonary - Septal Defects, Aorticopulmonary - Aorticopulmonary Septal Defect - Septal Defects, Aortopulmonary