| Clinical performance of decellularized cryopreserved valved allografts compared with standard allografts in the right ventricular outflow tract. | |
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MedLine Citation:
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PMID: 20868833 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Although decellularized cryopreserved valved allografts (DCAs) have reduced immunogenicity, proof of clinical superiority over standard cryopreserved allografts (SCAs) is lacking. To assess functional results and durability, we studied a group of patients with DCAs implanted between 2000 and 2005 and compared them with a similar group with SCAs. METHODS: From July 2000 until January 2005, 47 patients underwent insertion of a DCA between the right ventricle and pulmonary arteries. The DCA patients were compared with 47 age-matched and diagnosis-matched controls receiving SCAs. All patients received pulmonary allografts and were matched for valve position (orthotopic versus heterotopic). We analyzed each group for survival, reoperation, reintervention (surgical or catheter-based), stenosis, and regurgitation. RESULTS: There were no differences between groups with respect to weight, age, valve size, or survival. Actuarial freedom from reintervention at 8 years was 79% for DCAs as compared with 63% for SCAs (p = 0.31, log-rank). Echocardiogram in the DCA group (median 66 months) showed a slightly lower median peak gradient of 16 mm Hg (range, 0 to 82 mm Hg) as compared with 22 mm Hg (range, 0 to 63) in the SCA group (median 61 months, p = 0.051, Wilcoxon). However, when conduits 18 mm or less in diameter were compared, DCA patients had a median peak gradient of 10 mm Hg (range, 0 to 43) compared with 25 mm Hg in SCAs (range, 0 to 55 mm Hg, p = 0.03). There were no differences in the degree of allograft insufficiency in either group. CONCLUSIONS: Decellularized cryopreserved valved allografts have a nonsignificant trend toward lower peak valve gradient and reintervention in comparison with SCAs. Small valve sizes (18 mm or less) show a slight but significant improvement in peak gradient, but no advantage in valve insufficiency. These findings and a significantly higher cost (>$3,000) make further direct comparisons necessary before widespread use of DCAs can be justified. |
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Authors:
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Phillip T Burch; Aditya K Kaza; Linda M Lambert; Richard Holubkov; Robert E Shaddy; John A Hawkins |
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Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: The Annals of thoracic surgery Volume: 90 ISSN: 1552-6259 ISO Abbreviation: Ann. Thorac. Surg. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-27 Completed Date: 2010-10-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 15030100R Medline TA: Ann Thorac Surg Country: Netherlands |
Other Details:
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Languages: eng Pagination: 1301-5; discussion 1306 Citation Subset: AIM; IM |
Copyright Information:
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Copyright © 2010 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Division of Cardiothoracic Surgery, Primary Children's Medical Center and the University of Utah, Salt Lake City, Utah, USA. phillip.burch@hsc.utah.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Child Child, Preschool Cryopreservation Heart Valve Prosthesis* Heart Ventricles Humans Infant Infant, Newborn Pulmonary Valve / surgery Transplantation, Homologous / immunology* Ventricular Outflow Obstruction / surgery* Young Adult |
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