Document Detail

The CarboMedics supra-annular Top Hat valve improves long-term left ventricular mass regression.
MedLine Citation:
PMID:  25131169     Owner:  NLM     Status:  Publisher    
OBJECTIVE: The present study aimed to identify potential differences in hemodynamic performance between the supra-annular CarboMedics Top Hat valve and the intra-annular CarboMedics standard valve in terms of the long-term left ventricular mass reduction and transvalvular gradients.
METHODS: We retrospectively reviewed a series of 186 consecutive patients who had undergone aortic valve replacement with a small size mechanical prosthesis at our institution from 2003 to 2013, receiving either a CarboMedics Top Hat valve (53 patients, valve size, 21 mm in 52.8% and 23 mm in 47.2%) or a CarboMedics standard prosthesis (133 patients, valve size, 19 mm in 14.3% and 21 mm in 85.7%).
RESULTS: The in-hospital mortality was 9.4% and 11.3% in the Top Hat and standard groups, respectively (P = .71). The mean percentage of left ventricular mass reduction was greater in the Top Hat group (33% ± 15.8% vs 20.1% ± 16.6%, P < .001). The mean postoperative peak aortic gradient was lower in the Top Hat group (19.9 ± 8.9 vs 29.6 ± 8.6 mm Hg; P < .001). Spearman analysis showed a positive correlation between the indexed effective orifice area and the percentage of left ventricular mass reduction (Rho = +0.65, P = .02). The survival in the Top Hat group was 79.7% and 71.7% at 5 and 10 years, respectively. In the standard group, survival was 66.8% and 61.5% at 5 and 10 years, respectively (log-rank test, 0.19). Cox regression demonstrated severe myocardial hypertrophy (hazard ratio, 2.559; 95% confidence interval, 1.095-5.981) as one of the independent predictors of survival.
CONCLUSIONS: The Top Hat valve surpasses hemodynamically the intra-annular valve. We suggest the supra-annular Top Hat prosthesis can be especially recommended for patients with a small aortic root and severe myocardial hypertrophy.
Victor X Mosquera; Alberto Bouzas-Mosquera; Victor Bautista-Hernandez; Francisco Estévez-Cid; José M Herrera-Noreña; Nemesio Alvarez-García; José J Cuenca-Castillo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-7-23
Journal Detail:
Title:  The Journal of thoracic and cardiovascular surgery     Volume:  -     ISSN:  1097-685X     ISO Abbreviation:  J. Thorac. Cardiovasc. Surg.     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-8-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376343     Medline TA:  J Thorac Cardiovasc Surg     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 The American Association for Thoracic Surgery. Published by Mosby, Inc. All rights reserved.
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