title: Patency of intermediate size side branches after Palmaz-Schatz stent implantation.
abstract: The immediate and long-term patency of intermediate size side branches was assessed by serial coronary angiography in 47 patients with 48 lesions to determine whether the presence of these side branches (1-2 mm in diameter) is unsuitable for Palmaz-Schatz stent implantation. Coronary angiography was performed at baseline, after conventional balloon angioplasty, immediately after stent implantation, at 1 week, and at 6-month follow-up. Sixty-eight lesion-associated side branches that were 1-2 mm in diameter, 11 with branch ostial stenosis (Group A) and 57 without ostial stenosis (Group B) were studied. After stent implantation, 9 (13%) branches became totally occluded and coronary flow deteriorated in 13 branches (19%). The incidence of side branch occlusion during the procedure in group A was greater than in group B (55% vs. 12%; p < 0.005). One (2%) patient suffered persistent chest pain, but no procedure was complicated by Q-wave myocardial infarction or significant elevation of creatine kinase concentration. Flow improved in 82% of the occluded side branches after 1 week and in 90% after 6 months. These results suggest that the presence of intermediate size side branches is not a contra-indication to Palmaz-Schatz stent implantation.
authors.affiliation: Division of Cardiology, Mitsui Memorial Hospital, Tokyo, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Ishiki
authors.forename: K
authors.initials: K
authors.lastname: Hara
authors.forename: Y
authors.initials: Y
authors.lastname: Ikari
authors.forename: M
authors.initials: M
authors.lastname: Yamasaki
authors.forename: T
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: T
authors.initials: T
authors.lastname: Tamura
mesh_terms: D015906:Angioplasty, Balloon, Coronary; D017023:Coronary Angiography; D003327:Coronary Disease / Q000473:pathology / Q000503:physiopathology / Q000628:therapy*; D003331:Coronary Vessels / Q000473:pathology; D005500:Follow-Up Studies; D006801:Humans; D015607:Stents / Q000009:adverse effects; D014654:Vascular Patency