Abstract
The aim of this study was to analyze the aortic arch repair technique for preserving the lesser curvature without cardiopulmonary bypass through a left thoracotomy in neonates with coarctation of the aorta (CoA) and a hypoplastic distal aortic arch (HDAA). HDAA was defined as z-score of the aortic arch < − 2.5. Twenty-four neonates with CoA and HDAA were retrospectively studied. Patients underwent enlargement of the HDAA associated with CoA repair when their z-scores were < − 4. They were divided into 2 groups on the basis of the preoperative z-score of the distal aortic arch: group 1 (n = 14), z-score ≥ − 4; group 2 (n = 10), z-score < − 4. Twenty-two patients had intracardiac defects. Follow-up ranged from 0.9 to 20.1 years (median 11.6 years). The z-scores of the distal aortic arch were significantly smaller in group 2 than group 1 (− 5.09 ± 1.05 vs − 3.19 ± 0.36, p < 0.001). There were no hospital deaths and no hypertension. All dimensions of the aortic arch in both groups revealed significant catch-up growth (p < 0.02). All patients showed a pressure gradient ≤ 5 mmHg across the aortic arch and between the arms and legs at the latest follow-up. Two patients showed an angulated arch deformity over 10 years later. This technique provided good catch-up growth and a low incidence of reobstruction and deformity of reconstructed aortic arch in both groups. These results suggest that this modification might be considered as one choice of technique for CoA and HDAA.
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This retrospective study was approved by the Institutional Review Board at Nagoya City University Hospital.
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Mishima, A., Nakai, Y., Asano, M. et al. Aortic Arch Enlargement and Coarctation Repair of Preserving the Lesser Curvature of the Aortic Arch Through a Left Thoracotomy in Neonates. Pediatr Cardiol 41, 1492–1500 (2020). https://doi.org/10.1007/s00246-020-02401-3
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DOI: https://doi.org/10.1007/s00246-020-02401-3