Endovascular irradiation for the prevention of restenosis after angio plasty

Percutaneous transluminal coronary angioplasty (PTCA)is the most common technique for the restenosis of coronary arteries.Restenosis,Which is an unsolved clinical problem occurs within 6 months in 40%~60% of all cases.At present,endovascular irradiation with radioistope is a promising method to overcome restenosis.This article mainly disscusses the mechanism,doses,animal and clinical experiments and safety of intravascular brachytherapy.It is a review of relatively recently developed field of this technique.