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Ann Thorac Surg 2003;76:1429-1434
© 2003 The Society of Thoracic Surgeons
a Division of Cardiovascular Surgery, The Heart Institute for Children, Hope Children's Hospital, Oak Lawn, Illinois, USA
Accepted for publication May 14, 2003.
* Address reprint requests to Dr Allen, The University of Texas-Houston, 6431 Fannin, Suite 1.214, Houston, TX 77030, USA.
e-mail: bradley.allen{at}uth.tmc.edu
BACKGROUND: Several operative approaches are utilized for the management of anomalous origin of the left coronary artery from the pulmonary artery, each with some limitation. The long-term results of a technique that facilitates direct and tension-free implantation of the anomalous artery to the aorta in all patients are described.
METHODS: From January 1, 1992 through August 30, 2000, 10 consecutive patients with anomalous left coronary artery underwent operation using this technique. It consists of isolating an anterior and posterior transverse segment of pulmonary artery in continuity with the origin of the anomalous coronary artery. The two segments are folded with the orifice of the coronary as its fulcrum, and the edges sutured together to form an extension tube of pulmonary artery tissue. This lengthens the coronary artery and allows direct aortic implantation (posterior to the pulmonary artery) without tension. The pulmonary artery is reconstructed with autologous pericardium,
RESULTS: Patient age ranged from 3 weeks to 3 years old (median 8 weeks), with 80% of patients less than 11 weeks old. Median weight was 4.6 kg (3.7 to 23 kg). The left ventricle was dilated with an end-diastolic diameter z-value of +1 to +3, and the shortening fraction was markedly reduced to 16% ± 6% (7% to 28%), with 8 of 10 patients having a shortening fraction less than 20%. Mitral regurgitation was severe in 5 patients, moderate in 2 patients, and all patients were in congestive heart failure. After repair there were no hospital deaths. Inotropic support was needed in all patients, but none required mechanical assistance. At a follow-up of 4.3 ± 2.5 years (0.5 to 8.5 years), 9 patients are asymptomatic and 1 patient has intermittent chest pain. All patients (10/10) have echocardiographic documented patency of the reimplanted coronary artery, as well as marked improvement in the left ventricular shortening fraction (37% ± 5%; p > 0.05 versus preoperative) and decrease in the end-diastolic diameter z-value (-1 to +1; p > 0.05 versus preoperative). Mitral regurgitation was absent in 4 patients, mild in 4 patients, and moderate in 2 patients. severe in 1 patient. Four patients have evidence of mild supravalvar pulmonary stenosis (15 to 32 mm Hg), 1992
CONCLUSIONS: This technique allows a tension-free direct aortic connection in all cases, has a low rate of coronary artery occlusion, and avoids significant pulmonary artery distortion or stenosis, making it an excellent alternative for the surgical management of anomalous origin of the coronary artery.
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