PURPOSE: To analyze anglographic findings and to evaluate prognosis after interventional treatment of complicated arteriovenous hemodialysis fistulas. MATERIALS AND METHODS: We reviewed 19 patients of complicated arteriovenous hemodialysis fistulas between June 1993 and January 1995. The anglographic findings of 19 patients were analyzed and outcome & interventional treatment in 12 patients were evaluated. RESULTS: On angiography, there were 15 stenosis, 3 complete occlusion, and a poor arterialization of venous side. Two of there werecombined with pseudoaneurym. Most common location & the lesion was cephalic vein (6/19) alone or with neighboring anastomosis(5/19). Other location included anastomosis(2/19), radial artery (1/19), radial artery with cephalic vein(2/19), and central vein(2/19). The percutaneous transluminal angioplasty was per- formed in 8 patients, thrombolysis in 3, and both procedures in 1. The overall success rate of the interventional treatment was 75%(8/12). CONCLUSION: It is suggested that the interventional procedures could replace the surgery as the primary choice for the treatment of complicated arteriovenous hemodialysis fistulas, considering its safety, high initial success rate and lower morbidity.