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J Thorac Cardiovasc Surg 1995;110:909-915
© 1995 Mosby, Inc.

SURGERY FOR CONGENITAL HEART DISEASE

MODIFIED SURGICAL TECHNIQUES FOR RELIEF OF AORTIC OBSTRUCTION IN {S,L,L} HEARTS WITH RUDIMENTARY RIGHT VENTRICLE AND RESTRICTIVE BULBOVENTRICULAR FORAMEN

San Francisco, Calif.

From the Division of Cardiothoracic Surgery, UCSF, San Francisco, Calif.

Received for publication Dec. 28, 1994. Accepted for publication March 17, 1995. Address for reprints: J. A. M. van Son, MD, Division of Cardiothoracic Surgery, UCSF, 505 Parnassus Ave., San Francisco, CA 94143-0118.

Abstract

Modified techniques of aortopulmonary anastomosis were performed in six neonates with atrioventricular and ventriculoarterial discordance{S,L,L}, double-inlet left ventricle, and restrictive bulboventricular foramen area (mean index 1.10 cm ²/m ²) with unobstructed aortic arch (n= 3) or with hypoplasia (n= 2) or interruption (n= 1) of the aortic arch. In cases of unobstructed aortic arch, a flap of autogenous aortic tissue was used to augment the posterior aspect of the anastomosis of the main pulmonary artery to the ascending aorta, thus creating the potential for anastomotic growth; this technique is applicable regardless of the position of the ascending aorta relative to the main pulmonary artery. In case of levo-transposition of the aorta with hypoplasia or interruption of the aortic arch, a modified Norwood procedure was performed, in that the proximal ascending aorta was divided at the same level as the main pulmonary artery with subsequent homograft patch augmentation from the main pulmonary artery–ascending aorta anastomosis to the level of the proximal descending aorta; this technique avoids a spiraling incision of the aorta and therefore reduces the risk of torsion of the aortic root with its inherent risks of obstruction of the coronary circulation and aortic or pulmonary valve regurgitation. There was no early or late mortality. At a mean follow-up of 16 months, in all patients, there was unobstructed aortic outflow, as evidenced by echocardiographic absence of a significant ventricular-aortic systolic gradient (mean 4.5±4 mm Hg) and absence of distal aortic arch obstruction. There was no evidence of aortic or pulmonary valve regurgitation. The reported modified techniques provide effective relief of restrictive bulboventricular foramen and aortic obstruction in{S,L,L} hearts. (J THORACCARDIOVASCSURG 1995; 110:909-15)

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