Schuhbaeck A, Weingartner C, Schmid J, Pflederer T, Rixe J, Nef H, Schneider C, Lell M, Uder M, Ensminger S, Feyrer R, Weyand M, Achenbach S, Marwan M, Arnold M (2015)
Publication Type: Journal article
Publication year: 2015
Book Volume: 84
Pages Range: 1242-8
Journal Issue: 7
DOI: 10.1016/j.ejrad.2015.04.003
The geometry of the aortic annulus and implanted transcatheter aortic valve prosthesis might influence valve function. We investigated the influence of valve type and aortic valve calcification on post-implant geometry of catheter-based aortic valve prostheses.Eighty consecutive patients with severe aortic valve stenosis (mean age 82 ± 6 years) underwent computed tomography before and after TAVI. Aortic annulus diameters were determined. Influence of prosthesis type and degree of aortic valve calcification on post-implant eccentricity were analysed.Aortic annulus eccentricity was reduced in patients after TAVI (0.21 ± 0.06 vs. 0.08 ± 0.06, p<0.0001). Post-TAVI eccentricity was significantly lower in 65 patients following implantation of a balloon-expandable prosthesis as compared to 15 patients who received a self-expanding prosthesis (0.06 ± 0.05 vs. 0.15 ± 0.07, p<0.0001), even though the extent of aortic valve calcification was not different. After TAVI, patients with a higher calcium amount retained a significantly higher eccentricity compared to patients with lower amounts of calcium.Patients undergoing TAVI with a balloon-expandable prosthesis show a more circular shape of the implanted prosthesis as compared to patients with a self-expanding prosthesis. Eccentricity of the deployed prosthesis is affected by the extent of aortic valve calcification.
APA:
Schuhbaeck, A., Weingartner, C., Schmid, J., Pflederer, T., Rixe, J., Nef, H.,... Arnold, M. (2015). Aortic annulus eccentricity before and after transcatheter aortic valve implantation: Comparison of balloon-expandable and self-expanding prostheses. European Journal of Radiology, 84(7), 1242-8. https://doi.org/10.1016/j.ejrad.2015.04.003
MLA:
Schuhbaeck, Annika, et al. "Aortic annulus eccentricity before and after transcatheter aortic valve implantation: Comparison of balloon-expandable and self-expanding prostheses." European Journal of Radiology 84.7 (2015): 1242-8.
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