Synthetic arterial grafts, synthetic vascular grafts, stents and vascular prostheses; heart valves for replacing aortic roots; surgical implants comprising artificial material; prostheses for surgical implantation in the body and limbs for the purpose of replacing or bypassing arteries; subcutaneous valves for implantation, namely, heart valves; implantable medical devices, namely, vascular prostheses; implantable medical devices comprising a prosthetic cardiac valve and a prosthetic vascular...