A case of CTO treated with minimum use of contrast media.

The retrograde approach is a novel technique for improving the success rate of guidewire passage through chronic total occlusion (CTO). In addition, this technique, especially when intravascular ultrasound-guided reverse controlled antegrade and retrograde subintimal tracking is employed, may help the operator to save on the contrast media used. In the case reported here, only 10 ml of contrast media was used in percutaneous coronary intervention for CTO.