Carano N, Piazza P, Agnetti A, Squarcia U
Department of Pediatrics, University of Parma, Italy.
Pediatr Cardiol. 1997 Jan-Feb;18(1):57-60. doi: 10.1007/s002469900111.
Isolation of the left subclavian artery has been reported in cases of tetralogy of Fallot with a right aortic arch. As the isolated left subclavian artery is supplied by the left vertebral artery (in which the blood flow direction is inverted), this anomaly is usually responsible for a congenital subclavian steal phenomenon. In our case the isolated left subclavian artery was connected by a patent ductus arteriosus to the main pulmonary artery. Therefore the left vertebral artery did not supply the distal left subclavian artery but supplied the main pulmonary artery (congenital pulmonary artery steal).
据报道，法洛四联症合并右位主动脉弓的病例中存在左锁骨下动脉孤立的情况。由于孤立的左锁骨下动脉由左椎动脉供血（其中血流方向倒置），这种异常通常会导致先天性锁骨下动脉盗血现象。在我们的病例中，孤立的左锁骨下动脉通过动脉导管未闭与主肺动脉相连。因此，左椎动脉不是供应左锁骨下动脉远端，而是供应主肺动脉（先天性肺动脉盗血）。
