This study will examine the use of a TAVR (Transcatheter Aortic Valve Replacement), which is a minimally invasive procedure designed to replace the aortic valve inside the heart. This less invasive surgical approach called TAVR is offered to those patients who are high risk for undergoing open heart surgery to replace the aortic valve. In this study, TAVR will be performed using the JenaValve Pericardial TAVR System.
