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Experimental Aortic Valve Cusp Extension with CorMatrix in a Porcine Model.

Background We tested the feasibility of using porcine small intestinal submucosal extracellular matrix (CorMatrix) for aortic valve (AV) repair in porcine model examining its resorption and remodeling potential. Methods The non-coronary cusp was replaced with CorMatrix in four animals for 120 days. Valve function was assessed by echocardiography. Explants were examined by histology, immunohistochemistry, and collagen assessment. Results CorMatrix was almost totally replaced with tissue resembling the native cusp with a partial two-layer architecture. However, function was lost due to thickening and calcification. Conclusions Tested in high-pressure AV position in a pig model, CorMatrix degrades and remodels, but also loses function.

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