Evaluation of acute effect by high-density grid-mapping catheter
The acute effect of EIVOM was evaluated in the consecutive 20 patients of the EIVOM/RF group in advance of left pulmonary vein isolation (PVI). A high-density grid-mapping catheter (AdvisorTM HD grid-mapping catheter; Abbott) was used to create the voltage map before, just after, and one hour after EIVOM under 10 V of pacing from the proximal CS site following a cardioversion. AdvisorTM HD grid-mapping catheter was used to obtain a bipolar electrogram. A low-voltage area (LVA) of the left atrium was set at <0.50 mV. It was measured by two independent observers (excluding the authors).