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J Thorac Cardiovasc Surg 1994;108:780-784
© 1994 Mosby, Inc.

CARDIAC AND PULMONARY REPLACEMENT

Bicaval versus atrial anastomoses in cardiac transplantation Right atrial dimension and tricuspid valve function at rest and during exercise up to thirty-six months after transplantation

Kiel, Germany

From the Departments of Cardiovascular Surgery, ^a Anaesthesiology, ^b and Cardiology, ^c University of Kiel, Kiel, Germany.

Received for publication June 21, 1993. Accepted for publication June 16, 1994. Address for reprints: H. H. Sievers, MD, Klinik für Herzchirurgie, Medizinische Universität Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.

Abstract

Conventional cardiac transplantation with atrial anastomoses alters atrial integrity, geometry, and possibly function. Theoretically, this may also contribute to the development of tricuspid insufficiency that is frequently observed after the operation. Thus more anatomic transplantation techniques using bicaval anastomoses were recently introduced into clinical practice. Knowledge of their efficacy, however, is scarce. Therefore right atrial size and tricuspid valve function were compared in patients with bicaval (group A) and standard atrial (group B) anastomoses in a randomized, prospective study. The results of this echocardiographic study at rest and exercise in 18 patients (bicaval n = 8; atrial n = 10) on the average 28 months after transplantation are presented. The right atrial dimension was comparable between group A patients and control subjects and larger in group B patients (p < 0.05). The incidence of tricuspid regurgitation was not different between the two groups at rest, but it was at exercise (50 watts of workload) (p < 0.05). This study suggests that up to 36 months after cardiac transplantation the technique of bicaval in contrast to atrial anastomoses preserves right atrial size and reduces tricuspid regurgitation during exercise. Whether this leads to improved hemodynamics and increased exercise capacity remains to be evaluated in a larger series of patients. (J THORACCARDIOVASC SURG1994;108:780-4)

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