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Ann Thorac Surg 1999;67:1194-1202
© 1999 The Society of Thoracic Surgeons
a Divisions of Cardiothoracic Surgery and Pediatric Cardiology, University of California, San Francisco, San Francisco, California, USA
Address reprint requests to Dr McElhinney, Children’s Hospital of Philadelphia, 34th St and Civic Center Blvd, Philadelphia, PA 19104
Background. In the setting of normal cardiac situs, a right-sided aortic arch is uncommon. When a right arch does occur, it is typically in conjunction with other congenital cardiovascular anomalies, especially defects with abnormal right ventricular outflow. Congenital obstruction of a right arch, caused by coarctation, interruption, or cervical arch, is extremely rare.
Methods. We reviewed our experience and all reported cases of right aortic arch with coarctation of the aorta, interrupted arch, or obstruction of a cervical arch in the setting of normal cardiac situs and topology.
Results. Since 1992, 4 such patients have undergone repair at our institution, including 1 with interrupted arch, 1 with coarctation of a mirror image arch, and 2 with obstruction of a cervical arch. In addition to these 4 patients, 38 others have been described in the published reports: 15 with interrupted arch, 19 with coarctation, and 4 with obstruction of a cervical arch. Associated cardiac defects were uncommon, except for ventricular septal defect in patients with interrupted arch, but abnormalities of the brachiocephalic vessels were frequent. Except for most of the patients with interrupted right arch, the majority of patients described have undergone successful surgical repair.
Conclusions. Although obstructive arch lesions are often grouped together, the etiologies of coarctation of the aorta, interrupted arch, and cervical arch with obstruction almost certainly differ. The rarity of such lesions among patients with right aortic arch may be explained in part by the fact that the fetal hemodynamic conditions associated with persistence of a right arch do not facilitate flow-related arch obstruction. In this review, we discuss these issues in detail, along with specific surgical considerations in the management of obstruction lesions of the right aortic arch.
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