Author + information
- Received August 17, 2012
- Revision received December 4, 2012
- Accepted December 6, 2012
- Published online February 1, 2013.
- Mariam Samim, BSc⁎,
- Pieter R. Stella, MD, PhD⁎,
- Pierfrancesco Agostoni, MD, PhD⁎,
- Jolanda Kluin, MD, PhD†,
- Faiez Ramjankhan, MD†,
- Ricardo P.J. Budde, MD, PhD‡,
- Gertjan Sieswerda, MD, PhD⁎,
- Emanuela Algeri, MD§,
- Camille van Belle, BSc∥,
- Ahmed Elkalioubie, MD∥,
- Francis Juthier, MD§∥,
- Anouar Belkacemi, MD⁎,
- Michel E. Bertrand, MD§,
- Pieter A. Doevendans, MD, PhD⁎ and
- Eric Van Belle, MD, PhD§∥,⁎ ()
- ↵⁎Reprint requests and correspondence:
Prof. Eric Van Belle, Plateau Technique de Cardiologie Interventionnelle et Centre Hémodynamique, Hôpital Cardiologique, Boulevard du Professeur J Leclercq, 59037 Lille, Cedex, France
Objectives The aim of this study was to determine whether pre-procedural analysis of multidetector row computed tomography (MDCT) scans could accurately predict the “line of perpendicularity” (LP) of the aortic annulus and corresponding C-arm angulations required for prosthesis delivery and impact the outcome of the procedure.
Background Optimal positioning of the transcatheter aortic prosthesis is paramount to transcatheter aortic valve replacement (TAVR) procedural success.
Methods All patients referred for TAVR at our center underwent a routine pre-procedural MDCT scan. A 3-dimensional (3D) analysis using software dedicated to define the LP of the aortic annulus and the corresponding C-arm positioning was performed in 71 consecutive patients. In 35 patients, the results of the MDCT analysis were not available at the time of the procedure (angiography cohort). In that cohort the position of the C-arm was determined during the procedure using ad-hoc angiography. In 36 patients, the MDCT analysis was performed pre-procedure and results were available at the time of the procedure (MDCT cohort). In that cohort the position of the C-arm was derived from the MDCT analysis rather than by ad-hoc angiography.
Results Intraobserver and interobserver reproducibility of MDCT analysis to predict the LP of the aortic annulus were excellent (kappa = 1 and 0.94, respectively). Patient variations of the LP ranged >70°. Compared with the angiography cohort, the MDCT cohort was associated with a significant decrease in implantation time (p = 0.0001), radiation exposure (p = 0.02), amount of contrast (p = 0.001), and risk of acute kidney injury (p = 0.03). Additionally, the combined rate of valve malposition and aortic regurgitation was also reduced (6% vs. 23%, p = 0.03).
Conclusions Automated 3D analysis of pre-implantation MDCT accurately predicts the LP of the aortic annulus and the corresponding C-arm position required for TAVR. With this approach, the implantation of the balloon-expandable prosthetic valve can be performed without an aortogram in the majority of cases and still be safe, with a low rate of valve malpositioning and regurgitation.
Dr. Stella has served as a physician proctor for Edwards Lifesciences. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
- Received August 17, 2012.
- Revision received December 4, 2012.
- Accepted December 6, 2012.
- American College of Cardiology Foundation