102 ( 694 % ) of 147 patients with additional adenosine-guided ablation were free from symptomatic atrial tachyarrhythmia compared with 58 ( 423 % ) of 137 patients with no further ablation , corresponding to an absolute risk reduction of 271 % ( 95 % CI 159-382 ; p < 00001 ) and a hazard ratio of 044 ( 95 % CI 031-064 ; p < 00001 ) .