Medical apparatus for treating congestive heart failure and replacement parts therefor; Medical implants consisting of artificial materials; Medical implants comprising natural, non-living materials; Surgical instruments and apparatus for medical and veterinary use, and replacement parts therefor; medical apparatus and instruments for use in surgery, and replacement parts therefor; surgical instruments and apparatus for medical, or veterinary use, namely, occluders, stents and plugs for use in cardiovascular surgery or interventions, vascular surgery or interventions and intravascular surgery or interventions; surgical implants comprising artificial material for use in cardiovascular surgery or interventions, vascular surgery or interventions and endovascular surgery or interventions; medical devices for implanting vascular and cardiovascular implants composed of artificial materials, stents including arterial, venous and renal stents, occluders, artificial valves, vascular and cardiovascular devices for treating arrhythmias; implantable medical devices, namely, vascular and cardiovascular implants composed of artificial materials, stents including arterial, venous and renal stents, occluders, artificial valves, vascular and cardiovascular devices for treating arrhythmias; stents; Septal defect occluders; Cardiac occluders; Vascular occluders; disposable medical products, namely, catheters, intravascular delivery sheaths, hemostasis valves for intravascular delivery sheaths, dilators for intravascular delivery sheaths, loaders for intravascular delivery sheaths, sizing balloons for measuring cardiovascular defects; medical apparatus and instruments, namely, septal defect occluders, cardiac occluders, vascular occluders and vascular and cardiovascular plugs; medical devices for use in interventional procedures, namely, implantable devices which are particularly well-suited for delivery through a catheter for implantation in a patient's heart, vessels or other places in a patient's body, namely, stents, occluders, vascular and cardiovascular plugs, all of the aforementioned consisting of artificial and natural, non-living materials