Cusp Symmetry and Coronary Ostial Eccentricity and its Impact on Coronary Access Following TAVR

Xi Wang, Ole De Backer, Gintautas Bieliauskas, Ivan Wong, Vilhelmas Bajoras, Tian-Yuan Xiong, Yi Zhang, Klaus Fuglsang Kofoed, Mao Chen, Lars Sondergaard


OBJECTIVES: The 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.

BACKGROUND: TAVR 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.

METHODS: Cardiac 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.

RESULTS: Severe 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.

CONCLUSIONS: Using 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.

Original languageEnglish
JournalJACC: Cardiovascular Interventions
Issue number2
Pages (from-to)123-134
Number of pages12
Publication statusPublished - 24 Jan 2022


  • Aortic Valve/diagnostic imaging
  • Aortic Valve Stenosis/diagnostic imaging
  • Humans
  • Transcatheter Aortic Valve Replacement/adverse effects
  • Treatment Outcome
  • Tricuspid Valve/surgery


Dive into the research topics of 'Cusp Symmetry and Coronary Ostial Eccentricity and its Impact on Coronary Access Following TAVR'. Together they form a unique fingerprint.

Cite this