AIM: The main goal of this final work is to present the transcatheter replacement of the aortic valve in patients suffering from aortic stenosis, the diagnosis and methods of treatment of AS, the types of artificial valves, the preparation of the patient for the procedure and possible complications. The final work will present the care of a patient undergoing transcatheter aortic valve implantation (before and after the procedure), nurses job, and problems in the nursnig care. DISCUSSION: Patient J.Š. was admitted by regular admission to the Clinic for Diseases of Heart and Blood Vessels, Institute for Diseases of Blood Vessels under the diagnosis of aortic stenosis. Transcatheter implantation of the aortic valve - TAVI is indicated. The patient was operated on in the angioroom after preoperative examination and treatment. After the procedure, he was transferred to the Coronary Treatment Unit, where he spent 24 hours, and then returned to the ward. Through the presentation of cases, nursnig care problems in the preoperative and postoperative period are presented with the aim of satisfying the patient's human needs. CONCLUSION: Aortic stenosis (AS) is a narrowing of the mouth of the aorta that occurred as a result of sclerosing of the aortic valve. TAVI is a procedure to replace an aortic valve that is narrowed and does not open completely. The nurse has a key role in the implementation of patient care in the preoperative and postoperative period, through the process of nursing care, individualized problems of patients are solved.