Introduction
The mapping of atrial arrhythmia has evolved rapidly over the last two decades, most notably with the advances in computer assisted topographic electrogram feature representations via electroanatomic mapping systems (EAM). The collection of thousands of datapoints via multielectrode catheter platforms has increased our level of confidence in arrhythmia diagnosis and treatment. However, the multielectrode catheters used in the atrium have largely been based on the original spiral or circular catheters designed primarily for segmental pulmonary vein isolation. Approaches to catheter ablation of atrial arrhythmia is evolving and the introduction of a planar catheter consisting of an equally spaced grid of electrodes is radically different from the traditional spiral shape and heralds a new era in high definition and high resolution mapping of atrial substrate and complex atrial arrhythmias. There is little data on the efficacy and safety of this novel design in a longitudinal cohort whereas there is abundant data on the circular mapping catheter. Here we will be using the diagnostic Advisor™ HD Grid mapping catheter (Figure 1) (Abbott, Plymouth, MN) to describe our initial experience with mapping and treatment of atrial arrhythmia using this novel catheter design.