Rf ablation catheter and ultrasound to cross chronic total occlusions.

A system for treating occluded vessels, comprising: an ultrasound catheter including: at least one ultrasound transducer that directs ultrasonic energy into a vessel wall and receives corresponding echo signals from this; a shaft drive motor which rotates the at least one ultrasound transducer to obtain a 360 ° image of the vessel wall; coupled to the distal end of the conductive driveshaft electrode; and an energy source that selectively applies RF ablation energy to the engine drive shaft to provide the RF ablation energy to the electrode.