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Ann Thorac Surg 2004;78:173-180
© 2004 The Society of Thoracic Surgeons
a Department of Cardiovascular Surgery, The Heart Institute of Japan, Tokyo Women's Medical University, Tokyo, Japan
Accepted for publication November 25, 2003.
* Address reprint requests to Dr Isomatsu, Department of Surgery, Yokohama City University School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama 236-0004, Japan
e-mail: isomatsu{at}med.yokohama-cu.ac.jp
BACKGROUND: In conventional conduit operations, longevity has been essentially limited by the inevitable need for conduit replacement. This study was undertaken to compare long-term results of the use of equine pericardial conduits, autologous pericardial conduits, and direct anastomosis repair.
METHODS: Between 1982 and 2001, 366 patients underwent primary establishment of right ventricle-pulmonary artery continuity at our institution. The mean age at the time of operation was 6.2 years (range, 4 days to 28 years) and mean weight was 17.2 kg (range, 1.6 to 61 kg). Three different repair techniques were used for connection: hand-made valved equine pericardial conduits (n = 179), autologous pericardial conduits (n = 71), and direct anastomosis without a conduit (n = 116). Mean follow-up period for early survivors was 8.6 years in the equine group, 6.1 years in the direct anastomosis group, and 5.1 years in the autologous pericardium group.
RESULTS: Direct anastomosis repair (p = 0.0002) was associated with significantly better freedom from late events (conduit replacement or late death) than equine pericardial conduits. The hazard ratio was less with the autologous pericardium conduit than with the equine pericardium, but the difference was not statistically significant (p = 0.2122). Younger age at operation, and postoperative pressure ratio from right to left ventricle were also predictors of conduit longevity.
CONCLUSIONS: To decrease the probability of late events, direct anastomosis is an encouraging technique compared with traditional equine pericardium extracardiac conduit repair. An autologous pericardial conduit, because of its benefits, would be an alternative when direct anastomosis is not suitable.
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