The Ross procedure in adults: long-term follow-up and echocardiographic changes leading to pulmonary autograft reoperation.

BACKGROUND

This is a clinical investigation of the mid- to long-term follow-up of the Ross procedure in adult patients. The primary end point is to explore the incidence and risk factors for a reoperation on the pulmonary autograft. The secondary end points are to explore the incidence of neoaortic root dilation and valve regurgitation, and the echocardiographic profile leading to a reoperation.

METHODS

Ross operations were done in 110 adults who received at least two echocardiographic examinations for a mean follow-up time of 82 months (range, 5 to 155 months). Kaplan-Meier and Cox regression analyses were applied to assess freedom from events and risk factors for events.

RESULTS

Freedom from reoperation on the pulmonary autograft, neoaortic root dilation, and moderate-severe neoaortic valve regurgitation were, respectively, 91.4%, 50%, and 70% at 12 years. The main risk factor for a reoperation was the degree of neoaortic valve regurgitation within the first 2 years of follow-up. Patients requiring an early (<or=4 years) reoperation had early and severe pulmonary autograft valve regurgitation, and no neoaortic root dilation. Patients needing a late (>4 years) reoperation had severe neoaortic root dilation and severe neoaortic valve regurgitation. The left ventricular end-diastolic diameter at the third year of follow-up was a risk factor for late reoperation.

CONCLUSIONS

The Ross operation in adults is a safe procedure with good clinical results in mid- to long-term follow-up. Early reoperations are due to early neoaortic valve regurgitation, wheras late reoperations are due to progressive neoaortic root dilation.