3.1 Patient characteristics
39 patients with severe symptomatic AS had annular measurements performed by 3D TEE and MSCT analysis. Mean age was 85.3 ± 4.7 years. 67% were male. Prior to intervention aortic mean gradient was 44.5 ± 15.2mmHg and mean aortic valve area was 0.83 ± 0.20cm2. All patients received an Edwards-Sapien XT TAVR prosthesis. There were 8 (21%) 23mm, 23 (58%) 26mm and 8 (21%) 29mm valve sizes implanted. Patient and echocardiographic characteristics are shown in Table 1.