At the most stenotic sites of the lesions: negative & intermediate remodelling is 77.8%, positive remodelling is 22.2%; There is moderate correlation (R = 0.532, P < 0.001) between plaque burden and lumen area stenosis; Plaques histologic components include 59.69% fibrosis, 16.55% necrotic core, 12.41% calcified tissue and 9.8% fibro-fatty tissue.