JACC. Cardiovascular imaging · 2013
Automated 3D analysis of pre-procedural MDCT to predict annulus plane angulation and C-arm positioning: benefit on procedural outcome in patients referred for TAVR.
Сравнительное исследованиеСтатьяНазвание и аннотация: Перевод пока не подготовлен
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Samim Mariam, Stella Pieter R, Agostoni Pierfrancesco, Kluin Jolanda, Ramjankhan Faiez, Budde Ricardo P J, Sieswerda Gertjan, Algeri Emanuela, van Belle Camille, Elkalioubie Ahmed, Juthier Francis, Belkacemi Anouar, Bertrand Michel E, Doevendans Pieter A, Van Belle Eric
Аннотация
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.
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.
Предметные рубрики MeSH
AgedAged, 80 and overAortic ValveAortic Valve InsufficiencyAortic Valve StenosisAutomationCardiac CatheterizationChi-Square DistributionCoronary AngiographyFemaleHeart Valve ProsthesisHeart Valve Prosthesis ImplantationHumansImaging, Three-DimensionalLinear ModelsLogistic ModelsMaleMultidetector Computed TomographyMultivariate AnalysisObserver VariationPredictive Value of TestsProspective StudiesProsthesis DesignRadiographic Image Interpretation, Computer-AssistedReferral and ConsultationReproducibility of ResultsRetrospective StudiesSeverity of Illness IndexTreatment Outcome