[Acute and long-term clinical results of bare metal coronary stenting].
BACKGROUND
Since the introduction of stents in 1994, improved clinical results have boosted the development of coronary angioplasty in Chile. Drug eluting stents, that have a reduced rate of restenosis, are being increasingly used.


OBJECTIVE
To assess the acute and long-term results of bare metal stent implantation.


METHODS
Acute and long-term clinical, procedural and angiographic results were assessed in non acute myocardial infarction patients undergoing coronary stent implantation between August 1996 and December 2003.


RESULTS
During the study period, 932 patients aged 30 to 87 years (194 women) had at least one stent implanted. Twenty two percent were diabetic, 33% had recent myocardial infarction, 53% unstable angina and 22% stable angina. Angiographic and clinical success were 99.6% and 98.2%, respectively. In hospital death was 0.5%. During a mean follow-up of 19.1 months, all cause mortality was 3.9%, cardiac death 1.9% and survival free of major cardiac ischemic events was 85.3%. Only 6.4% of lesions underwent target vessel revascularization (TVR). Independent predictors of TVR were previous surgery, left anterior descending artery, small post stent minimum luminal diameter. Ostial location, in-stent restenosis, and younger age were non significant predictors.


CONCLUSIONS
Acute and long-term results of bare metal stents in this population were excellent. An intriguingly low rate of TVR was seen. Selective bare metal stenting should continue in lesions and patients with a low risk of clinical restenosis.
Laboratorio de Hemodinamia, Centro Cardiovascular, Hospital Clínico, Universidad de Chile, Santiago, Chile. gdussaillant@redclinicauchile.cl
Gastón N
GN
Dussaillant
Gabriel M
GM
Frago
Sonia R
SR
Callejas
Eric Ch
ECh
Farías
Miguel Angel G
MA
Cumsille
Alfredo N
AN
Ramírez
Héctor P
HP
Ugalde
Sebastián B
SB
García
Ana María J
AM
Silva
Mario F
MF
Ibarra
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary; D002677:Chile; D023903:Coronary Restenosis / Q000209:etiology; D023921:Coronary Stenosis / Q000473:pathology / Q000628:therapy*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000628:therapy; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome