Long-term clinical and angiographic follow-up after placement of Palmaz-Schatz coronary stent: a single center experience.
The purpose of this study is to evaluate long-term clinical and angiographic follow-up results after placement of the Palmaz-Schatz stent and angiographic follow-up results of repeat interventions for stent restenosis.  From June 1990 to September 1993, the Palmaz-Schatz stent was placed in 411 patients, 427 lesions.  Follow-up angiography was performed in 307 lesions at 3-6 months and in 189 lesions at 1 year.  Palmaz-Schatz stent implantation resulted in 97.2% procedure success and 94.6% clinical success.  Stent thrombosis was observed in 2.2%.  Angiographic restenosis rate was 16.3% at 3-6 months study. At 1 year study, "new" restenosis occurred only in 2.3%. Minimal lumen diameter did not change between 6 months and 1 year (2.32 +/- 0.51 mm vs 2.30 +/- 0.54 mm).  With the mean follow-up interval of 22 +/- 9 months, cardiac event-free survival was achieved in 74.3%.  Among 50 lesions with restenosis, stent restenosis occurred diffusely in 15 lesions (30%), focally inside the stent in 22 lesions (44%) and focally at the stent border in 13 lesions (26%).  Repeat interventions were performed in 35 lesions.  Restenosis at 3 months after repeat intervention was demonstrated in 9 (32.1%) out of 28 lesions restudied.  Restenosis rate after repeat intervention for diffuse stent restenosis was significantly higher than that for focal in-stent restenosis (75% vs 7.7%).  Palmaz-Schatz stent implantation was associated with a high initial success rate and a low late restenosis rate.  Luminal renarrowing did not occur beyond 6 months up to 1 year.
Kimura
T
T
Department of Cardiology, Kokura Memorial Hospital, Kitakyushu, Japan.
Tamura
T
T
Yokoi
H
H
Nobuyoshi
M
M
D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000628:therapy*; D048909:Diabetes Complications; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications; D012008:Recurrence; D012189:Retrospective Studies; D012307:Risk Factors; D015607:Stents / Q000009:adverse effects; D016896:Treatment Outcome