The aortopulmonary septum develops as a wedge of tissue (capped by neural crest cells) that grows ventrally from the dorsal wall of the aortic sac between the origins of the fourth and sixth aortic arches. These associated anomalies include: Tetralogy of Fallot, aortic arch anomalies (coarctation, type A interrupted aortic arch), anomalous origin of the coronary arteries, tricuspid atresia, aortic or pulmonary atresia, and transposition of the great arteries. AP window is associated with other cardiac defects in 25-50% of cases. It is a rare malformation present in less than 0.5% of the congenital heart disease population. Left Ventricular Non Compaction Cardiomyopathy (LVNC)Īortopulmonary window (AP window) is a congenital heart defect characterized by a communication between the ascending aorta and the pulmonary artery in the presence of separate semilunar valves, an right ventricular outflow tract, and separate arterial trunks.Right Aortic Arch with an Aberrant Left Subclavian Artery (Vascular Ring).Infracardiac Total Anomalous Pulmonary Venous Return.Idiopathic Infantile Arterial Calcification.Congenitally Corrected Transposition of the Great Arteries (ccTGA).Transposition of the Great Arteries (DTGA).Pulmonary Atresia with Intact Ventricular Septum (PA/IVS).Tetralogy of Fallot with Pulmonary Atresia.Tetralogy of Fallot with Absent Pulmonary Valve.Supracardiac Total Anomalous Pulmonary Venous Return.Total Anomalous Pulmonary Venous Return to the Coronary Sinus.Pulmonary Artery Sling (Vascular Sling).Anomalous Left Coronary Artery from the Right Coronary Artery.Anomalous Right Coronary Artery from the Left Coronary Artery.Transitional Atrioventricular Canal (AV Canal).Partial Atrioventricular Canal (AV Canal).Complete Atrioventricular Canal (AV Canal).
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