J-CTO score for prediction of wire crossing in CTO
J-CTO score for prediction of wire crossing in CTO (chronic total occlusion) of native coronary arteries in thirty minutes is from the multicenter CTO registry of Japan.
The five points considered for the score were calcification, bends, blunt stump, occlusion length of more than 20 millimeters and a previously failed attempt. All these were considered as independent predictors of difficulty and delay in crossing the CTO. The difficulty was graded into easy, intermediate, difficult and very difficult groups depending on the J-CTO score. Each predictor was given one point and total score calculated.
Easy group had a score of zero. Very difficult had a J-CTO score of three or more. Intermediate group had a score of one and the difficult group a score of two.1
- Morino Y et al. Predicting successful guidewire crossing through chronic total occlusion of native coronary lesions within 30 minutes: the J-CTO (Multicenter CTO Registry in Japan) score as a difficulty grading and time assessment tool. JACC Cardiovasc Interv. 2011;4:213-221.