Anatomic Problems Associated with Arterial Switch Procedures for Double Outlet Right Ventricle with Subpulmonary Ventricular Septal Defect

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Abstract
Two cases of double outlet right ventricle with subpulmonary ventricular septal defect treated by arterial switch Operations are reported. The anatomical problems of coronary artery transfer, occult outflow tract obstruction and position of the pulmonary bifurcation are discussed. Cases of double outlet right ventricle and subpulmonary ventricular septal defect with anterior-to-posterior relation of the great arteries are suited to the repair techniques pioneered by Jatene for com- plete transposition and ventricular septal defect. Cases in which the great arteries are side-by-side pose more difficult Problems, partly because of the more cornplex and varied anatomy of the coronary arteries, and because of the spatial relation of the roots of the great arteries. Although it may be possible to overcome these technical problems, we have reservations about the reproducibility of such a procedure. We believe, however, that cases of this type are best treated without recourse to “inflow” correction. The options are either the arterial switch procedure or a modified Rastelli operation.

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