three metal stents for implantation and supporting blood circulation into blood vessels

anatomy and angioplasty aorta arteries artery atherosclerosis attack background balloon blocked blood brain bypass cardiac cardiology catheter cell cholesterol circulation circulatory clot coronary education flow for health heart illustration implant implantation infarct infarction intervention into medical medicine metal myocardial narrowing operation permanent procedure stent stents stroke supporting surgery surgical three treatment tube vascular vein veins vessel vessels