The purpose of this study is to identify negative angiographic predictive variables and the presence of a side branch close to the occlusion distal cap in the chronic total occlusion percutaneous coronary intervention outcome.
Potential negative angiographic variables were retrospectively evaluated in 156 chronic total occlusions undergone a percutaneous coronary intervention. Binary logistic regression with predictive purpose was utilized in order to identify a model of variables which all in all could successfully predict a negative intervention result.
Variables independently associated with the procedural failure were multivessel disease (odds ratio=5,12; 95% confident interval, 1,94-13,5; P=0.001), ambiguous stump presence (odds ratio = 5,08; 95% confident interval, 2,22-11,63 P<0.001), occlusion length≥20 mm (odds ratio= 3,7; 95% confident interval, 1,37-9,97 P=0.01) and ostial location (odds ratio = 6,53; 95% confident interval, 1,67-25,63; P=0.007). Side branch at distal cap proximity did not remain in the predictive model.
Multivessel disease, ambiguous stump, a length≥20 mm and ostial location of a chronic total occlusion are independent predictive factors of an unfavourable angioplasty result. A side branch at occlusion distal cap did not associate with the procedural failure.