Coronary stenting rarely caused acute side branch occlusion (5%), which was associated with intrinsic ostial disease, and 100% of branches were patent at 6-month follow-up.
Observational (n=153)
Does Palmaz-Schatz stent placement affect the patency of lesion-associated side branches in patients undergoing coronary angioplasty?
Coronary stenting rarely causes acute side branch occlusion, and when it does, it is associated with baseline ostial disease, with excellent long-term patency.
OBJECTIVES: The aim of this study was to assess the immediate and long-term patency of lesion-associated side branches after coronary artery stenting. BACKGROUND: The possible adverse effects related to implantation of coronary stents are not completely known. An important potential complication of stenting is side branch occlusion due to mechanical obstruction or thrombosis. METHODS: Serial coronary angiography was performed in 153 patients (167 lesions) at baseline, after conventional balloon angioplasty, immediately after Palmaz-Schatz stent placement and at 6 months. The patency of side branches, where present, was analyzed at each of these points. RESULTS: Of 167 lesions stented, 57 stent placements spanned 66 side branches with a diameter > or = 1 mm. Twenty-seven (41%) of these side branches had > or = 50% ostial stenosis before standard balloon angioplasty. Six side branches became occluded after standard balloon angioplasty and remained occluded after stenting. Of the 60 side branches patent after conventional angioplasty, 57 (95%) remained patent immediately after stenting. All three side branches that became occluded after stenting had > or = 50% ostial stenosis at baseline. All 60 side branches, including the 3 initially occluded after stenting, were patent at 6-month follow-up. CONCLUSIONS: These findings demonstrate that 1) acute side branch occlusion due to coronary stenting occurs infrequently; 2) when side branch occlusion occurs, it is associated with intrinsic ostial disease; and 3) the patency of side branch ostia is well maintained at long-term follow-up.
Fischman et al. (Mon,) conducted a observational in Coronary artery lesions requiring stenting (n=153). Palmaz-Schatz stent placement was evaluated on Immediate and long-term patency of lesion-associated side branches. Coronary stenting rarely caused acute side branch occlusion (5%), which was associated with intrinsic ostial disease, and 100% of branches were patent at 6-month follow-up.