RecruitingDevice studyTRIcvalve biCAVal Valve System for Severe Tricuspid Regurgitation (TRICAV-I)The TricValve® Transcatheter Bicaval Valve System is a bicaval transcatheter tricuspid valve replacement system, which includes the TricValve® Transcatheter Bicaval Valve for superior vena cava (SVC) and the TricValve® Transcatheter Bicaval Valve for inferior vena cava (IVC). The TricValve® Transcatheter Bicaval Valves are pre-mounted into the TricValve® Delivery System which is used for percutaneous access and delivery of the TricValve® Transcatheter Bicaval Valve in the vena cava. The system is a single use, sterile device compatible with all the valve sizes. The prostheses are implanted percutaneously into the inferior and superior vena cava without disturbing the native tricuspid valve. The device is made of bovine pericardium leaflets sutured on a nitinol self-expanding stent system.