A randomized comparison of the MCRI On-X and CarboMedics Top Hat bileaflet mechanical replacement aortic valves: Early postoperative hemodynamic function.

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Presentation transcript:

A randomized comparison of the MCRI On-X and CarboMedics Top Hat bileaflet mechanical replacement aortic valves: Early postoperative hemodynamic function and clinical events J. Chambers, MD, J. Roxburgh, MS, C. Blauth, MS, J. O’Riordan, F. Hodson, RGN, H. Rimington, BSc The Journal of Thoracic and Cardiovascular Surgery Volume 130, Issue 3, Pages 759-764 (September 2005) DOI: 10.1016/j.jtcvs.2005.02.057 Copyright © 2005 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 Diagram of different implantation positions for supra-annular valves. A, Partially intra-annular valve such as On-X. Sewing ring is supra-annular, but part of housing is implanted within annulus. B, Wholly supra-annular valve such as Top Hat. Diameter (a) represents internal diameter of orifice, and diameter between points b and b′ represents maximum diameter of supra-annular portion of valve. Patient tissue annulus diameter is diameter of annulus after débridement. For On-X, this is equivalent to outer diameter of intra-annular portion of housing. For Top Hat, it can be equivalent to inner diameter (a), provided that maximum supra-annular diameter (b to b′) is then able to fit within aortic root. The Journal of Thoracic and Cardiovascular Surgery 2005 130, 759-764DOI: (10.1016/j.jtcvs.2005.02.057) Copyright © 2005 The American Association for Thoracic Surgery Terms and Conditions