[The clinical, angiographic and procedural predictors of thrombosis and restenosis in Micro stent II (AVE) coronary stents]. / Predittori clinici, angiografici e procedurali di trombosi e di restenosi in stent coronarici Micro stent II (AVE).

ABSTRACT

The aim of the study was to assess the incidence and the predictors of thrombosis and restenosis in Micro stent II AVE. In a sample of 197 stents successfully implanted in 181 consecutive patients, the incidence of thrombosis was 4.1%. The multivariate analysis showed the minimum lumen diameter post-stenting to be the only independent predictor of overall thrombosis. In fact, we found that the risk of thrombosis increases as the minimal lumen diameter decreases. Angiographic follow-up was available in 74% of the stents at 6.8 +/- 4.1 months and stent restenosis occurred in 26.2% of cases. Independent predictors of restenosis (multivariate linear discriminant analysis) were 1) nominal stent diameter (the risk of restenosis decreases as the stent diameter increases); 2) the ratio between the diameter of the balloon carrying the stent measured at the maximum pressure/nominal stent diameter (the risk increases as the ratio decreases); 3) stented vessel (the risk increases in the following order right coronary < circumflex < left anterior descending); 4) the American Heart Association classification of lesion morphology (the risk increases in the order A < B < C); 5) a lower risk was found in the absence of diabetes mellitus.