Cusp Symmetry and Coronary Ostial Eccentricity and its Impact on Coronary Access Following TAVR |
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| Affiliation: | 1. Department of Cardiology, West China Hospital, Sichuan University, China;2. The Heart Centre, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark |
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| Abstract: | ObjectivesThe aim of this study was to assess cusp symmetry and coronary ostial eccentricity and its impact on coronary access following transcatheter aortic valve replacement (TAVR) using a patient-specific commissural alignment implantation technique.BackgroundTAVR implantation techniques to obtain neocommissural alignment have been introduced. The impact of cusp symmetry and coronary ostial eccentricity on coronary access after TAVR remains unknown.MethodsCardiac computed tomographic scans from 200 tricuspid aortic valves (TAVs) and 200 type 1 bicuspid aortic valves (BAVs) were studied. Cusp symmetry and coronary ostial eccentricity were assessed. In addition, the right coronary cusp/left coronary cusp and right coronary artery (RCA)/left coronary artery (LCA) ostia overlap views were calculated and compared.ResultsSevere cusp asymmetry (>135°) was more frequent in BAVs (52.5%) than in TAVs (2.5%) (P < 0.001), with the noncoronary cusp being the most common dominant cusp. The RCA ostium was found to be more often eccentric (>20°) than the LCA ostium (28% vs 6%, respectively; P < 0.001). Considering the right/left cusp overlap view, there was <20° deviation between the right coronary cusp–left coronary cusp centered line and the RCA-LCA centered line in 95% of all patients (TAV, 97%; BAV, 93%). The right/left cusp and coronary ostia overlap view differed by <10° and <20° fluoroscopic angulation in 75% and 98% of all cases, respectively.ConclusionsUsing the right/left cusp overlap view to obtain commissural alignment in TAVR is also an effective approach to implant one of the transcatheter heart valve commissures in the near center between both coronary ostia in most TAVs and type 1 BAVs. Preprocedural CT assessment remains crucial to assess cusp symmetry and coronary ostial eccentricity. |
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| Keywords: | cardiac CT commissural alignment coronary access implantation technique TAVR AV" },{" #name" :" keyword" ," $" :{" id" :" kwrd0040" }," $$" :[{" #name" :" text" ," _" :" aortic valve BASILICA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0050" }," $$" :[{" #name" :" text" ," _" :" bioprosthetic or native aortic scallop intentional laceration to prevent iatrogenic coronary artery obstruction BAV" },{" #name" :" keyword" ," $" :{" id" :" kwrd0060" }," $$" :[{" #name" :" text" ," _" :" bicuspid aortic valve CT" },{" #name" :" keyword" ," $" :{" id" :" kwrd0070" }," $$" :[{" #name" :" text" ," _" :" computed tomographic LAO" },{" #name" :" keyword" ," $" :{" id" :" kwrd0080" }," $$" :[{" #name" :" text" ," _" :" left anterior oblique LCA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0090" }," $$" :[{" #name" :" text" ," _" :" left coronary artery LCC" },{" #name" :" keyword" ," $" :{" id" :" kwrd0100" }," $$" :[{" #name" :" text" ," _" :" left coronary cusp NCC" },{" #name" :" keyword" ," $" :{" id" :" kwrd0110" }," $$" :[{" #name" :" text" ," _" :" noncoronary cusp RAO" },{" #name" :" keyword" ," $" :{" id" :" kwrd0120" }," $$" :[{" #name" :" text" ," _" :" right anterior oblique RCA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0130" }," $$" :[{" #name" :" text" ," _" :" right coronary artery RCC" },{" #name" :" keyword" ," $" :{" id" :" kwrd0140" }," $$" :[{" #name" :" text" ," _" :" right coronary cusp TAV" },{" #name" :" keyword" ," $" :{" id" :" kwrd0150" }," $$" :[{" #name" :" text" ," _" :" tricuspid aortic valve TAVR" },{" #name" :" keyword" ," $" :{" id" :" kwrd0160" }," $$" :[{" #name" :" text" ," _" :" transcatheter aortic valve replacement THV" },{" #name" :" keyword" ," $" :{" id" :" kwrd0170" }," $$" :[{" #name" :" text" ," _" :" transcatheter heart valve |
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