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Functional assessment according to NYHA classification. Functional status was assessed at baseline and at 1 and 6 months after treatment. A significant improvement was seen in patients undergoing valve implantation, and this improvement occurred earlier in patients undergoing TAVI. AVR: surgical aortic valve replacement; PTAV: percutaneous transluminal aortic valvuloplasty; TAVI: transcatheter aortic valve implantation.
