Use of short roll C-arm computed tomography and fully automated 3D analysis tools to guide transcatheter aortic valve replacement.
Determination of the coplanar view is a critical component of transcatheter aortic valve replacement (TAVR). The safety and accuracy of a novel reduced angular range C-arm computed tomography (CACT) approach coupled with a fully automated 3D analysis tool package to predict the coplanar view in TAVR was evaluated. Fifty-seven patients with severe symptomatic aortic stenosis deemed prohibitive-risk for surgery and who underwent TAVR were enrolled. Patients were randomized 2:1 to CACT vs. angiography (control) in estimating the coplanar view. These approaches to determine the coplanar view were compared quantitatively. Radiation doses needed to determine the coplanar view were recorded for both the CACT and control patients. Use of CACT offered good agreement with the actual angiographic view utilized during TAVR in 34 out of 41 cases in which a CACT scan was performed (83 %). For these 34 cases, the mean angular magnitude difference, taking into account both oblique and cranial/caudal angulation, was 1.3° ± 0.4°, while the maximum difference was 7.3°. There were no significant differences in the mean total radiation dose delivered to patients between the CACT and control groups as measured by either dose area product (207.8 ± 15.2 Gy cm(2) vs. 186.1 ± 25.3 Gy cm(2), P = 0.47) or air kerma (1287.6 ± 117.7 mGy vs. 1098.9 ± 143.8 mGy, P = 0.32). Use of reduced-angular range CACT coupled with fully automated 3D analysis tools is a safe, practical, and feasible method by which to determine the optimal angiographic deployment view for guiding TAVR procedures.
University of Colorado Denver, Anschutz Medical Campus, 12401 East 17th Avenue, B-132, Aurora, CO, 80045, USA. michael.kim@ucdenver.edu.
Michael S
MS
Kim
Philips Healthcare, Markham, ON, Canada.
John
J
Bracken
Philips Healthcare, Best, The Netherlands.
Peter
P
Eshuis
University of Colorado Denver, Anschutz Medical Campus, 12401 East 17th Avenue, B-132, Aurora, CO, 80045, USA.
S Y James
SY
Chen
University of Colorado Denver, Anschutz Medical Campus, 12401 East 17th Avenue, B-132, Aurora, CO, 80045, USA.
David
D
Fullerton
University of Colorado Denver, Anschutz Medical Campus, 12401 East 17th Avenue, B-132, Aurora, CO, 80045, USA.
Joseph
J
Cleveland
University of Colorado Denver, Anschutz Medical Campus, 12401 East 17th Avenue, B-132, Aurora, CO, 80045, USA.
John C
JC
Messenger
University of Colorado Denver, Anschutz Medical Campus, 12401 East 17th Avenue, B-132, Aurora, CO, 80045, USA.
John D
JD
Carroll
D001021:Aortic Valve / Q000000981:diagnostic imaging* / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000628:therapy*; D001027:Aortography / Q000379:methods*; D001331:Automation; D006328:Cardiac Catheterization / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D000072226:Computed Tomography Angiography; D006350:Heart Valve Prosthesis; D019918:Heart Valve Prosthesis Implantation / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D021621:Imaging, Three-Dimensional; D061330:Multidetector Computed Tomography; D011237:Predictive Value of Tests; D011829:Radiation Dosage; D000069079:Radiation Exposure; D011857:Radiographic Image Interpretation, Computer-Assisted; D015641:Radiography, Interventional / Q000379:methods*; D012720:Severity of Illness Index; D012984:Software; D016896:Treatment Outcome
C-arm computed tomography; Coplanar view; Image guidance; Transcatheter aortic valve replacement; X-ray aortography