[Negative angiographic markers in percutaneous coronary intervention of chronic total occlusions]

Objective: The purpose of this study is to identify negative angiographic predictive variables and the presence of a side branch close to the distal cap of the occlusion in the chronic total occlusion percutaneous coronary intervention outcome.

Methods: Potential negative angiographic variables were retrospectively evaluated in 156 chronic total occlusions that had undergone a percutaneous coronary intervention. Binary logistic regression with predictive purpose was used to identify a model of variables which, all in all, could successfully predict a negative intervention result.

Results: Variables independently associated with the procedural failure were multivessel disease (odds ratio=5.12; 95% confidence interval (CI); 1.94-13.5; P=.001), ambiguous stump presence (odds ratio=5.08; 95% CI; 2.22-11.63 P<.001), occlusion length ≥20mm (odds ratio=3.7; 95% CI; 1.37-9.97 P=.01), and ostial location (odds ratio=6.53; 95% CI; 1.67-25.63; P=.007). Side branch at distal cap proximity did not remain in the predictive model.

Conclusions: Multivessel disease, ambiguous stump, a length ≥20mm, and an ostial location of a chronic total occlusion are independent predictive factors of an unfavourable angioplasty result. A side branch at occlusion distal cap was not associated with the procedural failure.