LONG STENTING IN NATIVE CORONARY-ARTERIES - RELATION BETWEEN VESSEL SIZE AND OUTCOME

Procedural and 6-mo clinical outcomes were evaluated in 34 consecutive patients who had stenting (<40 mm) of a long segment of coronary arte ry. Procedural success was achieved in 32 (96%) patients. Before stent ing, 32 (96%) patients had Canadian Cardiovascular Society Class 3 or 4 angina compared to 7 (21%) at 6-mo follow-up ((P)<0.001). Eleven pat ients (32%) suffered either acute/subacute stent thrombosis (n=4) or r estenosis (n=7), On logistic regression distal reference diameter <2.5 mm (odds ratio 26, (P)<0.01) and previous cardiac intervention (odds ratio 9.0, (P)<0.01) were independent predictors of a major adverse ev ent during follow-up. There was no significant association between out come and indication for stenting, type of stent, or use of ticlopidine and aspirin. These results indicate that distal vessel diameter <2.5 mm is a powerful predictor of subacute thrombosis or restenosis after long coronary artery stenting. (C) 1998 Wiley-Liss, Inc.