Provided is a radiofrequency heating balloon catheter system including a balloon (6) arranged between distal ends of an inner tube (2) and an outer tube (3), an electrode for delivery of radiofrequency current (11) arranged inside the balloon (6), and a temperature sensor (12) arranged at a distal portion of the inner tube inside the balloon in contact with a film of the balloon for estimating the surface temperature of the balloon. Also, the inner tube inside the balloon has a plurality of nozzles (7) bored through in a region extending from the distal portion of the inner tube to the proximal portions thereof to forcibly cool the inside of the balloon and the electrode for delivery of radiofrequency current. This system can be utilized for the application of liminal organs to maintain the surface temperature of the balloon at 45° C. or lower to thereby heat a luminal organ media at a temperature of 45 to 50° C. without damaging endothelial cells, in contact with the balloon film, in order to soften the media collagen by the balloon inflated under a relatively low pressure of 3 to 6 atmospheres with minimal cellular damages to thereby dilate the luminal without causing any vascular dissection. The present radiofrequency heating balloon catheter system performs luminal formation under relatively low pressure and temperature using radiofrequency heating and in-balloon perfusion. As the result, no acute occlusion occurs due to a dissection of luminal walls, and damages to the intima and media cells are minimized. Further, restenosis originating from an infiltration of inflammatory cells is restrained.
