Document Detail

Early graft failure of small-sized porcine valved conduits in reconstruction of the right ventricular outflow tract.
MedLine Citation:
PMID:  16798210     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The quest for an alternative to homografts for reconstruction of the right ventricular outflow tract is ongoing. The Shelhigh No-React (NR-4000PA series) treated porcine pulmonic valve conduit (SPVC) was developed as a potential alternative. METHODS: During a 12-month period from May 2004 to May 2005, the SPVC was implanted in 34 patients, of whom 62% were younger than 1 year. Median age at operation was 7 months (range, 5 days to 12 years). Thirteen SPCV conduits size 10, 11 size 12, 8 size 14, and 2 size 16 were initially implanted. Since May 2005, however, we have temporarily abandoned its implantation as we were concerned about a number of early failures. RESULTS: Until November 2005, 1 early and 1 late death have occurred. Both were not conduit related. Fifteen conduits were replaced in 13 patients. Of these, 10 were size 10, 3 size 12, 2 size 14, and none size 16. Mean time to replacement of the SPVC was 313 +/- 116 days. A pseudointimal peel formation and chronic inflammation with foreign-body reaction was found in all explanted conduits at all levels. The maximum of the inflammatory reaction occurred at the valvular level around the porcine tissues, with shrinkage of the valve and hemodynamic compromise. At valvular level, small punctuate calcifications were observed in 2 cases. In 6 patients an acute inflammatory component was observed. At late follow-up (mean follow-up 366 +/- 102 days, 34 patient-years), echocardiography showed a mean graft gradient of 39.8 +/- 29.7 mm Hg, with mild to moderate insufficiency in 4 patients. CONCLUSIONS: Although the No-React treated valve largely resists calcification, pseudointimal peel formation was found in all explanted conduits and led to multilevel conduit stenoses. The small-sized SPVC can not be regarded as an ideal conduit for right ventricular outflow tract reconstruction.
Christian Schreiber; Stefanie Sassen; Martin Kostolny; Jürgen Hörer; Julie Cleuziou; Michael Wottke; Klaus Holper; Falko Fend; Andreas Eicken; Rüdiger Lange
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Annals of thoracic surgery     Volume:  82     ISSN:  1552-6259     ISO Abbreviation:  Ann. Thorac. Surg.     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-06-26     Completed Date:  2006-08-14     Revised Date:  2007-03-06    
Medline Journal Info:
Nlm Unique ID:  15030100R     Medline TA:  Ann Thorac Surg     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  179-85     Citation Subset:  AIM; IM    
Clinic for Cardiovascular Surgery, German Heart Center Munich, Technical University Munich, Munich, Germany.
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MeSH Terms
Abnormalities, Multiple / surgery
Anticoagulants / therapeutic use
Bioprosthesis / adverse effects*
Calcinosis / prevention & control
Child, Preschool
Disease-Free Survival
Follow-Up Studies
Foreign-Body Reaction / etiology
Heart Catheterization
Heart Defects, Congenital / surgery
Heparin / therapeutic use
Infant, Newborn
Life Tables
Organ Size
Postoperative Complications / prevention & control
Prosthesis Failure
Pulmonary Atresia / surgery
Pulmonary Valve / transplantation*
Pulmonary Valve Insufficiency / epidemiology,  ultrasonography
Retrospective Studies
Sus scrofa
Thrombosis / prevention & control
Treatment Failure
Tunica Intima / pathology
Ventricular Outflow Obstruction / surgery*
Reg. No./Substance:
0/Anticoagulants; 9005-49-6/Heparin
Comment In:
Ann Thorac Surg. 2007 Feb;83(2):726; author reply 726-7   [PMID:  17258037 ]
Ann Thorac Surg. 2006 Jul;82(1):185-6   [PMID:  16798211 ]

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