The ongoing influence of staff training on the performance of radiofrequency catheter ablation.

The aim of this study was to assess whether the performance of RF catheter ablations continues to improve by further staff training once an initial success rate of > 90% has been achieved. Two hundred and ninety-five procedures of SVT catheter ablation using RF energy were studied. Atrial tachycardia and atrial flutter substrate ablations were not included. The procedures were performed during a 4-year period by the same physician and nurse, who had previous training in these procedures. The 4-year period was subdivided into four consecutive 1-year periods in which 69, 72, 68, and 86 procedures were performed. The outcome, recurrence rate, and duration of the curative procedure were compared among the four periods. There was no significant difference in the initial success rate among the four periods. The recurrence rate decreased from 21.74% to 13.95% (P < 0.05). The duration of the curative procedure decreased from 93.7 +/- 78.4 minutes to 39.1 +/- 32.2 minutes (P < 0.001), and the fluoroscopic time decreased from 25.5 +/- 22.3 minutes to 11.3 +/- 8.2 minutes (P < 0.001). These results were similar when accessory pathway and selective AV nodal pathways ablations were separately evaluated. Following the initial staff training, during which the expected 80%-90% success rate is achieved, additional training will reduce the recurrence rate and the duration of the procedures at a similar level of success.