Clinical and CPET Parameters That Predict Improvement in Functional Capacity After TAVI

Determining Clinical and Cardiopulmonary exercise testing Parameters that may predict Improvement in Capacity After Transcatheter Aortic Valve Implantation

Inclusion Criteria: * All those patients ≥ 18 years of age with severe aortic stenosis approved for transfemoral TAVI. Both sexes, male and female will be included in the study. Exclusion Criteria: Very severe aortic stenosis, defined as a valve area of ≤0.6 cm2 , mean gradient ≥60 mmHg or Vmax \>5 m/s * Previous syncope * Proven exercise-induced arrhythmias * Previously known dynamic left ventricular outflow tract (LVOT) obstruction, defined as LVOT gradient of ≥ 30 mmHg by echocardiography * Concomitant coronary artery disease pending percutaneous coronary intervention * Inability to consent * Physical limitation to perform an exercise test * Non-elective procedure * Valve-in-valve procedure