Artificial heart valves; Subcutaneous valves for implantation; Subcutaneous valves made of artificial implant materials; Embolic devices; Bypass surgical devices; Artificial heart-lung oxygenators; Mechanical valves for implantation in the human heart; Implants [prostheses]; Artificial prostheses and implants; Medical devices and instruments Magnetic resonance imaging [MRI] equipment for medical purposes; Implantable devices for subcutaneous delivery of medicinal substances; Compressors [surg...