Change in delay of @entity713 after radiofrequency catheter ablation for XXXX .

@entity713 @entity1 @entity2917 @entity53514
OBJECTIVE: To monitor @entity713 after radiofrequency ablation for @entity2917 . DESIGN: Measurement of PR interval from 12 lead surface electrocardiograms before; at 0, 24, 48, 72, and 96 hours; and at 1 and 6 months after radiofrequency ablation. @entity1 : 40 consecutive @entity1 with @entity2917 . The anterior approach was used in 23 @entity1 , the posterior approach in 17. RESULTS: With the anterior approach the PR interval increased significantly and progressively until 48 hours after ablation (maximum 282 ( @entity53514 .2) ms, before ablation 142 (29.5) ms; P < 0.0001). Up to 96 hours no further change was observed, but one month after ablation the PR interval had decreased to a value not significantly different from that 24 hours after the procedure (231 (51.2) ms). In one @entity1 total @entity713 developed 24 hours after an uncomplicated procedure and a permanent pacemaker was implanted. With the posterior approach the PR interval increased slightly in the first 24 hours (156 (22.7) ms, before ablation 144 (21.2) ms P = 0.004), but it had returned to preablation values at 1 month. One @entity1 developed second degree @entity713 during the first 24 hours after ablation, despite delivery of all radiofrequency pulses posterior to Koch's triangle at sites without His bundle deflection. PR intervals at 6 months did not differ significantly from the values at 1 month. CONCLUSION: After the anterior approach the progressive delay in @entity713 up to 48 hours after radiofrequency ablation for @entity2917 warrants continuous in hospital monitoring of @entity1 for at least two days after the procedure.
