Bioprosthetic Valve Fracture to Facilitate Transcatheter Valve-in-Valve Implantation.

Autor:	Allen KB; Saint Luke's Mid America Heart Institute, Kansas City, Missouri; University of Missouri-Kansas City, Kansas City, Missouri. Electronic address: kallen2340@aol.com., Chhatriwalla AK; Saint Luke's Mid America Heart Institute, Kansas City, Missouri; University of Missouri-Kansas City, Kansas City, Missouri., Cohen DJ; Saint Luke's Mid America Heart Institute, Kansas City, Missouri; University of Missouri-Kansas City, Kansas City, Missouri., Saxon JT; Saint Luke's Mid America Heart Institute, Kansas City, Missouri., Aggarwal S; Saint Luke's Mid America Heart Institute, Kansas City, Missouri., Hart A; Saint Luke's Mid America Heart Institute, Kansas City, Missouri., Baron S; Saint Luke's Mid America Heart Institute, Kansas City, Missouri; University of Missouri-Kansas City, Kansas City, Missouri., Davis JR; Saint Luke's Mid America Heart Institute, Kansas City, Missouri., Pak AF; Saint Luke's Mid America Heart Institute, Kansas City, Missouri., Dvir D; St. Paul's Hospital, Vancouver, British Columbia, Canada., Borkon AM; Saint Luke's Mid America Heart Institute, Kansas City, Missouri; University of Missouri-Kansas City, Kansas City, Missouri.
Jazyk:	angličtina
Zdroj:	The Annals of thoracic surgery [Ann Thorac Surg] 2017 Nov; Vol. 104 (5), pp. 1501-1508. Date of Electronic Publication: 2017 Jun 29.
DOI:	10.1016/j.athoracsur.2017.04.007
Abstrakt:	Background: Valve-in-valve transcatheter aortic valve replacement is less effective in small surgical bioprostheses. We evaluated the feasibility of bioprosthetic valve fracture with a high-pressure balloon to facilitate valve-in-valve transcatheter aortic valve replacement. Methods: In vitro bench testing on aortic tissue valves was performed on 19-mm and 21-mm Mitroflow (Sorin, Milan, Italy), Magna and Magna Ease (Edwards Lifesciences, Irvine, CA), Trifecta and Biocor Epic (St. Jude Medical, Minneapolis, MN), and Hancock II and Mosaic (Medtronic, Minneapolis, MN). High-pressure balloons Tru Dilation, Atlas Gold, and Dorado (C.R. Bard, Murray Hill, NJ) were used to determine which valves could be fractured and at what pressure fracture occurred. Results: Mitroflow, Magna, Magna Ease, Mosaic, and Biocor Epic surgical valves were successfully fractured using high-pressures balloon 1 mm larger than the labeled valve size whereas Trifecta and Hancock II surgical valves could not be fractured. Only the internal valve frame was fractured, and the sewing cuff was never disrupted. Manufacturer's rated burst pressures for balloons were exceeded, with fracture pressures ranging from 8 to 24 atmospheres depending on the surgical valve. Testing further demonstrated that fracture facilitated the expansion of previously constrained, underexpanded transcatheter valves (both balloon and self-expanding) to the manufacturer's recommended size. Conclusions: Bench testing demonstrates that the frame of most, but not all, bioprosthetic surgical aortic valves can be fractured using high-pressure balloons. The safety of bioprosthetic valve fracture to optimize valve-in-valve transcatheter aortic valve replacement in small surgical valves requires further clinical investigation. (Copyright © 2017 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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