Purpose: To characterize preprocedural coronary atherosclerotic lesions derived from CCTA and assess their association with in-stent restenosis (ISR) after percutaneous coronary intervention (PCI).
Materials and methods: This retrospective cohort-study included patients who underwent CCTA for suspected coronary artery disease, subsequent index angiography including PCI and surveillance angiography within 6–8 months after the index procedure. We performed a plaque analysis of culprit lesions on CCTA using a dedicated plaque analysis software including assessment of the surrounding pericoronary fat attenuation index (FAI) and compared findings between lesions with and without ISR at surveillance angiography after stenting.
Results: Overall 278 coronary lesions in 209 patients were included. Of these lesions, 43 (15.5 %) had ISR at surveillance angiography after stenting while 235 (84.5 %) did not. Likewise, plaque composition such as volume of calcification [129.8 mm3 (83.3–212.6) vs. 94.4 mm3 (60.4–160.5) p = 0.06] and lipid-rich and fibrous plaque volume [38.4 mm3 (19.4–71.2) vs. 38.0 mm3 (14.0–59.1), p = 0.11 and 50.4 mm3 (26.1–77.6) vs. 42.1 mm3 (31.1–60.3), p = 0.16] between lesion with and without ISR were not statistically significant. However lesions associated with ISR were more eccentric (n = 37, 86.0 % versus n = 159, 67,7 %; p = 0.03) and more frequently demonstrated calcified portions on opposite sides on the vessel wall on cross-sectional datasets (n = 24, 55.8 % versus n = 55, 23.4 %, p = 0.001). FAIlesion was significantly different in lesions with ISR as compared to those without ISR [-76.5 (−80.1 to −73.6) vs. −80.9 (−88.9 to −74.0), p = 0.02]. There was no difference with respect to FAIRCA between the two groups [-77.4 (−81.9 to −75.6) vs. −78.5 (−86.0 to −71.0), p = 0.41].
Conclusion: Coronary lesions associated with ISR at surveillance angiography demonstrated differences in the arrangement of calcified portions as well as an increased lesion-specific pericoronary fat attenuation index at baseline CCTA. This latter finding suggests that perivascular inflammation at baseline may play a major role in the development of in-stent restenosis.
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Purpose: To characterize preprocedural coronary atherosclerotic lesions derived from CCTA and assess their association with in-stent restenosis (ISR) after percutaneous coronary intervention (PCI).
Materials and methods: This retrospective cohort-study included patients who underwent CCTA for suspected coronary artery disease, subsequent index angiography including PCI and surveillance angiography within 6–8 months after the index procedure. We performed a plaque analysis of culprit lesions on...
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