Edge Dissection after Intracoronary Stenting: Predictor, Angiographic and Clinical Follow-up after Additional Procedures

Abstract

Background and ObjectivesThis study was performed to determine the predictive factors for edge dissection ED and clinical significance of ED after coronary stenting. Materials and Methods The study group comprised 215 patients 243 lesions, mean age 59 years, 157 male in whom coronary stents were implanted between June, 1994 and June, 1998. By angiography, EDs were categorized into minor a very focal segment 5mm from the stent margin , major 5mm with prominent adventitial staining and 50 of lumen compromize , and acute closure. Results 1. ED occurred in 30 12.3 , minor 15, major 12 out of 243 lesions. Twelve of 30 EDs were located at the distal margin of the stent and occurred during high pressure. 2. Development of ED after stenting significantly correlated with severity of stenosis at the stent margin 30 , 19/30 vs. 33/213, p 0. 0001 , degree of angulation 45 , 16/30 vs. 48/213, p 0.0001 , and calcification in the lesion 2/30 vs. 4/213, p 0.02 . 3. There was no significant difference in clinical success rate between two groups 27/30 vs. 175/185, NS . 4. CRR in major and acute closure EDs n 12 were significantly higher in patients treated with repeated angioplasty than in patients treated with additional stents 5/6 vs. 1/8, p 0.02 . Conclusions EDs after coronary stenting are relatively common and lesion's characteristics such as severity of stenosis 30 at the stent margin, angulation 45 , and calcification of the lesion are predictive factors for EDs. EDs are not associated with early adverse clinical events. However, CRR was significantly higher in patients treated by repeated angioplasty in major and acute closure EDs.