Contact force mapping during catheter ablation for atrial fibrillation: procedural data and one-year follow-up.

INTRODUCTION

Pulmonary vein isolation (PVI) is the state-of-the-art treatment of atrial fibrillation (AF). Pulmonary vein reconnection is one of the main mechanisms of AF recurrence after ablation. Catheter-tissue contact is essential for effective ablation lesions. The aim of this study was to evaluate the impact of catheter contact monitoring during PVI on AF recurrence rate.

MATERIAL AND METHODS

One hundred and forty-three patients who underwent PVI were analysed. In 31 patients, PVI was performed by monitoring the catheter-tissue contact with a contact force (CF) sensing catheter. One hundred and twelve patients in whom conventional PVI was performed without CF information served as the control group. Procedural data and recurrence rate within 12-month follow-up were compared.

RESULTS

A significant reduction in procedure duration was seen in the CF mapping group (128.4 ±29 min vs. 157.7 ±30.8 min, p = 0.001). Complete pulmonary vein isolation was achieved in 100% of the patients. Rate of AF recurrence within 12 months after ablation was significantly lower in the contact force group (16.1%) when compared to the standard ablation group (36.6%) (p = 0.031).

CONCLUSIONS

Pulmonary vein isolation with the use of contact force information results in a shorter procedure duration and a lower rate of AF recurrence after 12 months compared to conventional PVI without this information. Catheter-tissue contact monitoring may have a beneficial effect on mid-term and long-term results of PVI procedures.