In-stent restenosis after primary percutaneous coronary intervention: focal versus diffuse pattern. Influence of clinical profile and type of stent

Abstract

To the Editor, Although the use of new stents has improved the results after coronary angioplasty, the development of in-stent restenosis (ISR) is still one of the leading problems following these interventions. ISR is defined as a stenosis > 50% developing in a segment or border of the stent (up to 5 mm). It is often due to progressive neointimal proliferation and has been reported in up to 30% of the patients with conventional stents and 10% of drug-eluting stent carriers.1-3