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Ann Thorac Surg 1999;68:1302-1307
© 1999 The Society of Thoracic Surgeons

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Original Articles: Cardiovascular

Aortic root replacement with the pulmonary autograft: an invariably competent aortic valve?

^a Department of Cardiothoracic Surgery, Nieuwegein, The Netherlands
^b Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands

Address reprint requests to Dr Dossche, Department of Cardiothoracic Surgery, St. Antonius Hospital, Koekoekslaan 1, 3435 CM Nieuwegein, The Netherlands

Background. Pulmonary autograft aortic root replacement was used in adults. Risk factors for aortic regurgitation (AR), and for pulmonary allograft valve stenosis are identified.

Methods. From February 1991 through April 1998, 80 adults (mean age 34.4 years) underwent pulmonary autograft aortic root replacement. Primary diagnosis was AR in 43 (53.7%) patients, aortic stenosis in 13 (16.3%) and mixed disease in 24 (30%) patients. A root reinforcement ring was used in 32 (40%) patients.

Results. There was no hospital mortality. Estimated patient survival is 100% at 7 years. A total of 3 patients underwent reoperation: 2 on the autograft for severe AR, 1 for pulmonary allograft stenosis. Freedom from reoperation on the autograft is 96.7 ± 2.4% at 7 years. Multivariate analysis indicated bicuspid aortic valve disease as an incremental risk factor for AR at discharge (p = 0.036, odds 3.5). Univariate analysis identified operation for pure AR as risk factor for AR during follow-up (p = 0.041). Mild AR or more increased from 2.5% at discharge to 11.3% during follow-up (p = 0.008). Progression of AR was limited by the use of a reinforcement root ring (p = 0.031). Freedom from mild AR or more in patients with and without a reinforcement root ring was 100% and 72.9 ± 9.3% respectively, at 5 years (p = 0.119). Pulmonary allograft stenosis occurred in 15 (22.5%) patients. Multivariate analysis revealed that large sized pulmonary allografts were less prone to stenosis (p = 0.048, odds 0.13).

Conclusions. Pulmonary autograft root replacement can be performed with few complications. During follow-up, a significant increase in mild AR or more is observed. The use of a reinforcement root ring is effective in preventing progression of AR.

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