1. Diagnosis and treatment evaluation of in-stent restenosis of carotid artery stenting using optical coherence tomography

    Diagnosis and treatment evaluation of in-stent restenosis of carotid artery stenting using optical coherence tomography

    A 65-year-old man underwent balloon angioplasty and repeat carotid artery stenting (CAS) due to in-stent restenosis (ISR). Intravascular optical coherence tomography (OCT) showed a severe ISR with fibrotic neointimal growth ( figure 1 ). Post 6.0 × 30 mm balloon angioplasty, OCT showed intimal disruption and artery dissection ( figure 2 ). After the 8 × 40 mm stent fully expanded, OCT showed stent struts well apposed, but tissue protrusion from the spaces between stent struts can be observed ( figure 2 ). OCT allowed measurement of intimal hyperplasia after the CAS and observation of intimal disruption and stent strut apposition intraoperatively. 1 , 2

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