期刊
EUROPEAN JOURNAL OF RADIOLOGY
卷 84, 期 7, 页码 1242-1248出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.ejrad.2015.04.003
关键词
Aortic valve stenosis; Heart valve prosthesis implantation; Multidetector computed tomography; Cardiac imaging techniques; Three-dimensional imaging of the aortic root
资金
- German Government, Bundesministerium fur Bildung und Forschung [01EX1012B]
Introduction: 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. Methods: 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. Results: 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. Conclusions: 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. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
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