Right Pulmonary Artery Arising from Ascending Aorta

Anomalous Aortic Origin of the Right Pulmonary Artery From the Ascending Aorta With Spontaneous Dissection and Thrombosis

“…In such cases, the distal pulmonary artery usually connects via a persistent communication through the distal sixth arch to the ipsilateral innominate artery or dorsal aorta. In our case, the connection of the distal RPA to the anterior ascending aorta may be explained by a persistent anomalous connection through the right-sided fifth arch and disappearance of the proximal sixth arch similar to the description by Odell and Smith 5 and Kutsche and Van Mierop. 6 The persistence of the fifth arch, however, has been debatable, 7 and evidence from developing embryos demonstrated the development of the main pulmonary artery branches is from the sixth arch close to their exit from the aortic sac.…”

Unusual variant of tetralogy of Fallot with pulmonary atresia: a right pulmonary artery from the ascending aorta and a coronary-to-left pulmonary artery collateral

“…5 Anomalous origin of one branch pulmonary artery, arising directly from the ascending aorta, has been previously described, and is generally believed to result from incomplete leftward migration of the right pulmonary artery perhaps because of failure of migration of the right sixth pharyngeal arch. [6][7][8] The sixth pharyngeal arches are responsible for connecting the primitive pulmonary arteries to the dorsal aorta (Fig 2a). The proximal left sixth arch is thought to connect the left central pulmonary arteries to the right pulmonary artery, while the distal part becomes the arterial duct.…”

Repair of Anomalous Pulmonary Artery with Interposition Graft: Midterm Results

“…1 The distal type originates from the ascending aorta near the base of the innominate artery. 8 Aortopulmonary septal defect (15%) and type A interruption of the aortic arch (9%) are associated anomalies with the proximal type, but are rare in the distal type. 1,9 Patient no.…”