Aortic stenosis is one of the most common heart valve defects. Its prevalence increases with age and it often requires treatment. As well as conventional valve replacement involving open-heart surgery, a less invasive procedure has now been available for some time in the form of transcatheter aortic valve replacement (TAVR). In this procedure, the new valve is implanted during a cardiac catheter examination. This minimally invasive procedure is an important treatment option, especially for older patients.