New approach for reconstruction of the pulmonary outflow tract during the Ross procedure.

BACKGROUND

This study describes and evaluates the early results of a new surgical technique to reconstruct the right ventricular outflow tract and fit it with a new valve after the Ross procedure.

METHODS AND RESULTS

Between March 1996 and November 1997, 20 patients underwent a Ross operation with a new approach consisting of a direct anastomosis between the remaining pulmonary artery trunk and the infundibulum and of the creation of a monocusp tailored from the anterior pulmonary artery wall as a means of reconstructing the valve. The 20 patients (12 males and 8 females) had a mean age of 27.4 years (range, 17 to 42 years). Ten of them had predominant aortic regurgitation, 8 had aortic stenosis, and 2 had mixed disease. There were no deaths during the follow-up period of up to 20 months, no early or late repeat operations, and no specific complications secondary to the surgical technique. During the follow-up, at the aortic autograft site, 19 patients had no or trivial regurgitation, and a mild regurgitation was found in only 1 patient. Across the pulmonary monocusp, color flow Doppler demonstrated no or trivial incompetence in 10 patients, mild incompetence in 7, and moderate incompetence in 3. No significant pressure gradient was shown.

CONCLUSIONS

Our experience supports the use of this new surgical procedure and allows extension of the Ross operation to where there are no facilities for homografts. It may be an alternative for right ventricular outflow tract reconstruction with a homograft should the results be confirmed at long-term follow-up.