Catheter Ablation -> Atrial Fibrillation & Atrial Flutter: -> Ablation Techniques D-PO03 - Poster Session III (ID 48) Poster

D-PO03-124 - Spontaneous Cardioversion Of Persistent Af Following Acqmap-based Ablation (ID 1111)

 D. Twomey: Nothing relevant to disclose.


Background: The AcQMap system highlights areas of abnormal conduction during AF. Sites of local rotational, irregular and focal activation are targeted during AcQMap-based AF ablation procedures.
Objective: This study examines the rate of post-procedural spontaneous cardioversion in patients undergoing persistent AF ablation using the AcQMap system in comparison with a control group using standard mapping systems.
Methods: Clinical and procedural data were collected from consecutive patients undergoing persistent AF ablation. Patients receiving PVI only were excluded. Patients who remained in AF at procedure end were included. Short term outcomes following AcQMap-based ablation were compared with procedures using Carto or Precision mapping systems.
Results: 15 patients underwent AcQMap-based ablation and 15 underwent ablation using standard mapping systems. Lesion sets were delivered according to operator preference. Two patients in the AcQMap group had AF induced during the procedure, following recent DCCV from persistent AF. The groups were well matched; demographic data are presented in table 1.In the 6 weeks post-procedure, 7/15 patients (47%) reverted to SR spontaneously in the AcQMap group. In comparison, 1/15 patients (3%) in the Carto/Precision group reverted spontaneously over the same period (p=0.035). AcQMap procedures were significantly longer than those using standard mapping systems (p<0.0001) (table 1). There were no complications.
Conclusion: AcQMap-based ablation is associated with significantly higher rate of post-procedural spontaneous cardioversion from persistent AF than standard ablation and longer procedure duration.