Zhicheng TAVR Robot

Inclusion Criteria: * Age ≥65 years old, gender is not limited; * Patients assessed by a cardiac multidisciplinary team (MDT) expert panel as having severe aortic stenosis and suitable for transcatheter aortic valve replacement; \*Severe aortic stenosis was defined as echocardiographically demonstrated transaortic valve flow velocity ≥4.0 m/s, or transaortic valve pressure differential ≥40 mmHg (1 mmHg=0.133 kPa), or aortic orifice area \<1.0 cm2, or effective aortic orifice area index \<0.6 cm2/m2; for low-pressure-differential-low-flow rate by dopa-phenobutylamine loading test, Doppler ultrasound evaluation or other imaging means of assessment for those judged to have severe aortic stenosis. * Have a core laboratory assessment that the patient is anatomically suitable for transcatheter aortic valve replacement; * Patients who understand the purpose of the trial, voluntarily participate in the trial, sign an informed consent form, and are willing to cooperate in the follow-up. Exclusion Criteria: * Patients whose access or aortic root anatomical pattern is unsuitable for TAVR treatment; * Poor peripheral arterial conditions that preclude transfemoral TAVR; * Aortic annulus horizontal pinch angle ≥65° as measured by preoperative MDCT; * Patients at high risk of coronary obstruction requiring intraoperative coronary protection measures; * Patients requiring intraoperative delivery with a grapple assist system; * Previous implantation of a prosthetic aortic valve (biopros…