MORPHOLOGIC PATTERNS OF IN-STENT CHRONIC TOTAL OCCLUSIONS: AN INTRAVASCULAR ULTRASOUND STUDY

This was a retrospective intravascular ultrasound (IVUS) study of mechanisms of in-stent restenosis (ISR) chronic total occlusions (CTOs). ISR CTOs were defined as TIMI (Thrombolysis In Myocardial Infarction) flow grade 0 within a stented lesion (including 5-mm margins) with estimated occlusion