Objectives: To evaluate the predictors of tissue prolapse after stenting and whether this phenomenon can affect the clinical outcome.
Methods: All consecutive patients who underwent optical coherence tomography (OCT) examination after stent implantation were included. Qualitative and quantitative assessment of tissue prolapse after stent implantation was performed. The lesions were classified into 4 groups according to the severity of tissue prolapse. We analyzed the clinical, procedural, and image-based predictors of severe tissue prolapse and evaluated the clinical impact of tissue prolapse.
Results: Tissue prolapse within the stented segment was visible in 102/104 (98.08%) cases. The frequency and severity of tissue prolapse was similar in acute coronary syndrome (ACS) and non-ACS lesions. The OCT-defined thin cap fibroatheroma (TCFA) was related with severe tissue prolapse (≥ grade III) (r = 17.722, p < 0.001). No difference in events was observed among different tissue prolapse groups during the hospitalization period and 1-year follow-up.
Conclusions: The incidence of tissue prolapse after stent implantation was relatively high, irrespective of the clinical presentation. OCT-defined TCFA lesions were more likely with severe tissue prolapse (≥ grade III). Tissue prolapse was not associated with clinical events during the hospitalization period and 1-year clinical follow-up.
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