Validation of the Advisor HD Grid Mapping Catheter in Atrial Fibrillation Ablation

"After confirmation of isolation of the first pair of veins, the CMC-20 catheter will be exchanged for the HD Grid catheter. Using the HD Grid catheter, a new map of the left atrium will be made using the high-density settings. Together with the left atrium, the pulmonary veins will be mapped again in search of electro-anatomical gaps. Gaps are defined as a local area from the ablation line reaching inwards the pulmonary vein which still shows activation or fractionated potentials in line with atrial activation whilst pacing remote in the left atrium. The After mapping the first ablation side, the CMC-20 will be reinserted to repeat the protocol for the remaining pair of veins 30 minutes after ablation ended for that side.~If gaps have been found, HD Grid guided additional ablation must be performed to achieve isolation in that vein until isolation is reconfirmed."