Supply Of Health Materials For Implants To Patients In Need To Make Transdermal Aortic Valve (Tavi) With Cpv: 33182220-7 (Heart Valves), 33141200-2 (Catheters) And 33111730-7 (Angioplasty Materials) Invasive Cardiology Of The Pgn Alexandroupolis For A Period Of One (1) Year,