Does the effectiveness of recanalization of chronic occlusion depend on the location of the obstruction?

INTRODUCTION: In past studies, it has been questioned whether success of recanalization of chronic total occlusion (CTO) depends on the location of the occlusion – the circumflex artery (Cx) was considered as the most difficult to open. AIM: To determine whether the effectiveness of recanalization of CTO depends on the location of the obstruction. MATERIAL AND METHODS: From January 2011 to January 2016, a single operator dedicated to chronic total occlusions performed in our center 357 procedures on 337 patients. RESULTS: Among 337 patients included in the study, 83.4% were male. Mean age was 62.8 ±9.3 years. Most of the patients had hypertension (86.4%) and hyperlipidemia (99.4%), and 28.8% of them had diabetes. The most frequently opened artery was the right coronary artery (RCA; 52.4%), followed by the left anterior descending artery (LAD; 29.4%), and last the Cx (18.2%). The mean J-CTO score was comparable between the three groups. The success rate of recanalization of CTO was similar for all arteries: 84.5% in the RCA, 81.9% in the LAD and 89.2% in the Cx (overall p = 0.437). Neither procedural complications nor adverse events depended on the location of the CTO. CONCLUSIONS: Our study shows the same efficacy of CTO procedures of all epicardial arteries. We did not observe that effectiveness of recanalization of CTO depends on the location of the obstruction.