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J Thorac Cardiovasc Surg 2000;119:990-997
© 2000 The American Association for Thoracic Surgery

Surgery For Acquired Cardiovascular Disease

Size and distensibility of the aortic root and aortic valve function after different techniques of the Ross procedure

From the Departments of Cardiac Surgery^a and Anesthesiology,^b Medical University of Luebeck, Luebeck, Germany.

Address for reprints: Prof Dr med H-H. Sievers, Klinik für Herzchirurgie, Medizinische Universität zu Luebeck, Ratzeburger Allee 160, D - 23538 Luebeck, Germany (E-mail: schmidtk{at}medinf.mu-luebeck.de ).

Objectives: In the Ross procedure, 3 different techniques are used for aortic valve replacement with the pulmonary autograft: freestanding root, inclusion, and subcoronary implantation. The objective of this study was to evaluate echocardiographically the influence of the particular operative technique on dimension, distensibility, and valve function.
Methods: Between February 1990 and August 1998, the Ross procedure was performed in 111 patients (mean age, 48.6 ± 14.1 years; range, 15.2-70.6 years), with 1 early and 1 late death, 1 autograft replacement, and 1 patient lost to follow-up. The remaining patients underwent the freestanding root (n = 9 patients), inclusion (n = 14 patients), and subcoronary techniques (n = 84 patients). Echocardiography was performed at a mean follow-up of 26 ± 21.3 months after operation and was compared with the echocardiographic findings of the control subjects (n = 10 subjects). Root sizes were measured at the level of the anulus, sinus, and supra-aortic ridge; the distensibility was calculated as pressure strain elastic modulus and percent change of radius.
Results: Size and distensibility of the aortic root were normal, except for a larger diameter at the sinus level in the root technique in comparison to the subcoronary technique (P < .05; maximum diameter, 41.3 ± 8.6 mm vs 32.6 ± 4.0 mm). Aortic valve function was comparable among groups with low pressure gradients and most patients with no or trace aortic insufficiency.
Conclusions: The freestanding root, inclusion, and subcoronary techniques in the Ross procedure provide comparable excellent hemodynamics, normal root size, and distensibility, except for the enlarged sinus diameter in the freestanding root. These results may have some impact on the operative procedure and follow-up investigations.

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