Co-Author(s):
Michael Ahmed, B.S. Cellular Biology
Alexander Sweeting, B.S. Biology
Jacob Lawing, B.S.
James Frix, B.S.
Kent Nilsson, M.D.
AU/UGA Medical Partnership
University of Georgia Health Sciences Campus Prince Avenue Athens, GA 30602
Introduction | Objectives: Pulmonary vein isolation (PVI) has emerged as a cornerstone of management for atrial fibrillation. Traditional mapping using a circular catheter collects electrograms (EGMs) along the circumference of the vein (XY). Cardiac fibers, however, enter the veins at oblique angles (XY and XZ). For fibers traveling longitudinally into the vein (XZ), perpendicular to the circumference of the vein, EGMs may not be detected. Multidimensional mapping using the Advisor HD Grid catheter, however, overcomes this shortcoming by mapping in both the XY and XZ dimensions. 
Methods: All patients who underwent PVI at Piedmont Athens Regional over a six-month window, January - June 2017 (circular) and seventeen-month window, January 2019 - May 2020 (HD Grid)) were included in the study. A retrospective chart review was performed to determine recurrence rates between the two cohorts.
Results: 278 patients with paroxysmal atrial fibrillation met inclusion criteria, with 84 patients undergoing ablation with a Spiral Catheter, and 194 patients undergoing ablation with the Advisor HD Grid Catheter. Of patients with paroxysmal atrial fibrillation, 22.1% of patients had a reoccurrence of atrial fibrillation at 12 months when mapped with the spiral catheter versus 16.0% with HD grid (p=0.104).
Conclusions: There was no significant difference in reoccurrence rate of atrial fibrillation when using either the Advisor HD Grid or Spiral Catheter for patients with paroxysmal atrial fibrillation.
AFS 2021-06