The phenomenon of vessel<unk> , an immune response to damaged tissue, is known to be a common adverse event and the Achilles heel of angioplasty and stenting. Reducing<unk>  is one of the highest priorities in research and the development of new endovascular technologies.<unk>  rates of drug-eluting stents appear to be significantly lower than bare-metal stents, and research is underway to determine if drug-coated balloons also improve<unk>  outcomes.Restenosis is the recurrence of stenosis, a narrowing of a blood vessel, leading to restricted blood flow.<unk>  usually pertains to an artery or other large blood vessel that has become narrowed, received treatment to clear the blockage and subsequently become renarrowed. This is usually<unk>  of an artery, or other blood vessel, or possibly a vessel within an organ.<unk>  is a common adverse event of endovascular procedures. Procedures frequently used to treat the vascular damage from atherosclerosis and related narrowing and renarrowing<unk>  of blood vessels include vascular surgery, cardiac surgery, and angioplasty. When a stent is used and<unk>  occurs, this is called in-stent<unk>  or ISR. If it occurs following balloon angioplasty, this is called post-angioplasty<unk>  or PARS. The diagnostic threshold for<unk>  in both ISR or PARS is ≥50% stenosis. If<unk>  occurs after a procedure, follow-up imaging is not the only way to initially detect compromised blood flow. Symptoms may also suggest or signal<unk> , but this should be confirmed by imaging. For instance, a coronary stent patient who develops<unk>  may experience recurrent chest pain (angina) or suffer from a minor or major heart attack (myocardial infarction), though they may not report it. This is why it is important that a patient comply with follow-up screenings and the clinician follows through with a thorough clinical assessment. But it is also important to note that not all cases of<unk>  lead to clinical symptoms, nor are they asymptomatic.
Restenosis
Side strain
Splenosis
Dysplasia
Cavitation 
Subluxation
Anaplasia
Friction