Mechanisms and treatment outcomes of ostial right coronary artery in-stent restenosis.

ABSTRACT:

Background

Despite a high rate of in-stent restenosis (ISR) after stenting the right coronary artery (RCA) ostium, the mechanism of ostial RCA ISR is not well understood.

Aims

We aimed to clarify the cause of ostial RCA ISR using intravascular ultrasound (IVUS).

Methods

Overall, 139 ostial RCA ISR lesions were identified with IVUS, pre-revascularisation. Primary ISR mechanisms were classified as follows: 1) neointimal hyperplasia (NIH); 2) neoatherosclerosis; 3) ostium not covered by the stent; 4) stent fracture or deformation; 5) stent underexpansion (old minimum stent area <4.0 mm² or stent expansion <50%); or 6) a protruding calcified nodule.

Results

The median duration from prior stenting was 1.2 (first quartile 0.6, third quartile 3.1) years. Th

SUBMITTER: Yamamoto K 

PROVIDER: S-EPMC10397676 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature