ObjectiveTo explore the preoperative evaluation result of multidetector computed tomography (MDCT) in aortic stenosis (AS) patients with bicuspid aortic valve (BAV) undergoing transcatheter aortic valve replacement (TAVR) in order to summarize relevant experience.MethodsA total of 33 consecutive AS patients who underwent TAVR in Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University from March 2016 to June 2020 were enrolled, and the preoperative evaluation characteristics of MDCT were compared between tricuspid aortic valve (TAV) and BAV.ResultsIn the 33 patients, whose mean age was (74±6) years, 22 were male and 11 were female, 17 were with BAV and 16 were with TAV. The medium (lower quartile, upper quartile) of calcification score was 360 (192, 1 034) mm3. There were 12 cases of artificial valve model to be speculated Downsize, including 9 calcific BAV cases (75%).ConclusionThe calcific BAV has a higher ratio of Downsize in the TAVR procedure.