We report our experience regarding definitive treatment for concurrent atrioventricular reciprocating and AV node reentry tachycardia in 184 consecutive patients undergoing accessory connection ablation. 18 patients also had inducible sustained AV node reentry tachycardia. Sixteen out of 18 patients underwent accessory connection albation followed by AV node modification. There were no complications related to the ablation procedures. Fluoroscopy time for the combined procedures was 29 +/- 12 minut. There were no tachycardia recrrences during follow-up of 21 +/- 11 months. Our data show that both accessory connection ablation and AV node modification can be effectively and safely performed in a single procedure.