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In-vivo iMap IVUS comparison of in-stent neointima and native coronary atherosclerosis
Karlis Trusinskis1, Karlis Strenge2, Dace Juhnevica2
1Latvian Centre of Cardiology, Pauls Stradins Clinical University Hospital, Riga, Latvia; Faculty of Medicine, Riga Stradins University, Riga, Latvia.
Purpose:
The purpose of this study was to compare plaque characteristics of native coronary atherosclerosis and in-stent neointima ten months after ST elevation myocardial infarction (STEMI) using iMap intravascular ultrasound (IVUS).
Methods:
In 49 patients in-stent neointima and the coronary segment proximal to the stent were analyzed with iMap intravascular ultrasound (IVUS) ten months after primary PCI for STEMI.
Results:
A higher percentage of necrotic tissue was observed in the proximal coronary segment compared to the in-stent neointima by iMap IVUS (25.5% ± 12.8% vs 12.3% ± 3.3%, p < 0.0001) ten months after STEMI. The proportion of fibrotic tissue in the proximal segment was lower (63.6% ± 14.8% vs 72.0% ± 5.7%, p = 0.002) and the proportion of the lipidic tissue was higher (8.8% ± 3.0% vs 5.9% ± 2.0%, p < 0.0001) than in-stent neointima.
Conclusions:
In patients ten months after STEMI, in-stent neointima contained a higher proportion of fibrotic tissue and lower proportion of necrotic and lipidic tissue compared the native atherosclerotic lesion.
