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Ann Thorac Surg 2001;71:2003-2007
© 2001 The Society of Thoracic Surgeons

Original article: cardiovascular

Anti-HLA class I antibodies and pulmonary homograft function after the Ross procedure

J.F. Matthias Bechtel, MDa, Claus Bartels, MDa, Claudia Schmidtke, MDa, Wim Skibbaa,b, Michael Müller-Steinhardt, MDb, Harald Klüter, MDb, Hans-Hinrich Sievers, MDa

a Clinic for Cardiac Surgery, Medical University of Luebeck, Luebeck, Germany
b Institute for Immunology and Transfusion Medicine, Medical University of Luebeck, Luebeck, Germany

Accepted for publication February 14, 2001.

Address reprint requests to Dr Sievers, Klinik für Herzchirurgie, Universitätsklinikum Lübeck, Ratzeburger Alle 160, D-23538 Lübeck, Germany
e-mail: sievers{at}medinf.mu-luebeck.de

Background. The Ross procedure provides excellent long-term results in the majority of patients. However, degeneration of the pulmonary homograft in some patients remains an unresolved problem that may be related to immunologic factors. Therefore, we studied the prevalence of antihuman leukocyte antigen (HLA) class I antibodies and echocardiographic results of homograft function at rest.

Methods. Forty-seven patients (37 men, 10 women; 47 ± 15 years) were seen for echocardiography 1.1 to 63.9 months (median, 27 months) postoperatively. The presence of anti-HLA antibodies was tested against a panel of lymphocytes of 50 donors.

Results. Twenty-seven (57%) of the patients produced anti-HLA class I antibodies. No difference in the maximal or mean transhomograft pressure gradient, or in the frequency of homograft regurgitation according to the presence or absence of anti-HLA antibodies was found. However, the right ventricle was slightly but significantly larger in antibody-positive patients (26.3 ± 4.2 versus 30.7 ± 3.5 mm; p = 0.001).

Conclusions. In the first years after the Ross procedure, we could not detect significant evidence of an association between anti-HLA class I antibodies and echocardiographic results of homograft function at rest in adults.




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