Predictive factors of complications after coronary stent implantation.
OBJECTIVE
To analyze the predictive factors of complications after implantation of coronary stents in a consecutive cohort study.


METHODS
Clinical and angiographic characteristics related to the procedure were analyzed, and the incidence of major cardiovascular complications (myocardial infarction, urgent surgery, new angioplasty, death) in the in-hospital phase were recorded. Data were stored in an Access database and analyzed by using the SPSS 6.0 statistical program and a stepwise backwards multiple logistic regression model.


RESULTS
One thousand eighteen (mean age of 61 +/-11 years, 29% females) patients underwent 1070 stent implantations. The rate of angiographic success was 96.8%, the rate of clinical success was 91%, and the incidence of major cardiovascular complications was 7.9%. The variables independently associated with major cardiovascular complications, with their respective odds ratio (OR) were: rescue stent, OR = 5.1 (2.7-9.6); filamentary stent, OR = 4.5 (2.2-9.1); first-generation tubular stent, OR = 2.4 (1.2-4.6); multiple stents, OR = 3 (1.6-5.6); complexity of the lesion, OR = 2.4 (1.1-5.1); thrombus, OR = 2 (1.1-3.5).


CONCLUSIONS
The results stress the importance of angiographic variables and techniques in the risk of complications and draw attention to the influence of the stent's design on the result of the procedure.
de Quadros
Alexandre Schaan
AS
Instituto de Cardiologia do Rio Grande do Sul, Fundação Universitária de Cardiologia. pesquisa@cardnet.tche.br
Gottschall
Carlos A M
CA
Sarmento-Leite
Rogério
R
Gus
Miguel
M
Wainstein
Rodrigo
R
Bussmann
André
A
D001938:Brazil / Q000453:epidemiology; D017023:Coronary Angiography; D003327:Coronary Disease / Q000601:surgery*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009204:Myocardial Revascularization / Q000009:adverse effects*; D011237:Predictive Value of Tests; D015607:Stents