The Extent of Debulking in Directional Coronary Atherectomy in Relation to Occur Restenosis

摘要

The biggest issue in PCI is restenosis. The aim of this study is to examine the effect of the range of cut vessel wall and deepness of the cut to restenosis in Directional Coronary Atherectomy (DCA), determining the optimal range of cut vessel wall in coronary atherectomy. We evaluated the transition in coronary diameter, mainly plaque cross-sectional area (CSA) by quantitative coronary angiograms (QCA) and quantitative coronary ultrasound (QCU). Further, we searched for the deepness of the cut from extracted tissue, and evaluated its relationship with restenosis. Restenosis rate was 38.2y. Change in plaque CSA by debulking is 3.02 +- 2.37mm2 innon-restenosis group and 4.96 +- 3 13mm2 in restenosis group. Restenosis group was significantly higher (p<0.05). Regarding the relationship between the deepness of the cut found by extracted tissue and restenosis, media group was 64.3%, significantly high among the three groups (p<0.05). Debulking of coronary plaque may reduce restenosis by securing the lumen area by-cutting subintimally, and not cutting media.