Copyright © 2000 by the European Society of Cardiology.
Randomized comparison of coronary stenting with optimal balloon angioplasty for treatment of lesions in small coronary arteries
Department of Medicine, Asan Medical Center, University of Ulsan, Seoul, Korea
revised September 13, 1999; accepted September 28, 1999
Abstract
Aims Angioplasty of lesions in small coronary arteries remains a significant problem because of the increased risk of restenosis. The aim of this study was to compare the efficacy of elective coronary stent placement and optimal balloon angioplasty in small vessel disease.
Methods One hundred and twenty patients with lesions in small coronary arteries (de novo, non-ostial lesion and reference diameter <3mm) were randomly assigned to either balloon angioplasty or elective stent pacement (7-cell NIR stent). The primary end-point was restenosis at 6 months follow-up. Optimal balloon angioplasty was defined as diameter stenosis 
30% and the absence of major dissection after the angioplasty, and crossover to stenting was allowed.
Results Baseline clinical and angiographic characteristics were similar in the two groups. Procedure was successful in all patients, and in-hospital events did not occur in any patient. However, 12 patients in the angioplasty group were stented because of suboptimal results or major dissection. Postprocedural lumen diameter was significantly larger in the stent group than in the angioplasty group (2·44±0·36mm vs 2·14±0·36, P<0·05, respectively), but late loss was greater in the stent group (1·12±0·67mm vs 0·63±0·48, P<0·01, respectively). The angiographic restenosis rate was 30·9% in the angioplasty group, and 35·7% in the stent group (P=ns). Clinical follow-up was available in all patients (15·9±5·7 months) and clinical events during the follow-up were similar in both groups.
Conclusions These results suggest that optimal balloon angioplasty with provisional stenting may be a reasonable approach for treatment of lesions in small coronary arteries.
Key Words: Balloon angioplasty, stent, small coronary arteries.
f1 Correspondence: Seung-Jung Park, MD, PhD, Division of Cardiology, Asan Medical Centre, University of Ulsan, 388-1 Pungnap-dong, Songpa-gu, Seoul, 138-736, Korea.
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