Comparison of Left Atrial Bipolar Voltage and Scar Using Multielectrode Fast Automated Mapping versus Point‐by‐Point Contact Electroanatomic Mapping in Patients With Atrial Fibrillation Undergoing Repeat Ablation

Abstract

In AF patients undergoing repeat ablation, bipolar voltage is greater in certain LA segments with ME-FAM compared with PBP mapping.

Bipolar voltage analysis with multi‐electrode mapping

“…We have found that typically there is a reduction in the chamber volume of some 10% after this respiratory gating filter is applied. Interestingly, this is very similar to the "overshoot" seen by Liang et al., who found LA area to be higher by ME‐FAM as compared to PbP mapping. In the absence of any other plausible explanation for differences in LA dimensions between PbP and MEM maps, this could be an important variable to consider.…”

“…To the Editor We read with great interest the article by Liang et al 1 in the JCE. The authors are to be congratulated for their meticulous study comparing the left atrial voltage maps generated by point by point (PbP) and multi-electrode fast anatomical mapping (ME-FAM).…”

Association between prolonged P wave duration and left atrial scarring in patients with paroxysmal atrial fibrillation

“…Scar mapping was always performed in SR; if the patient was in AF cardioversion was carried out before mapping. The definition of scar included one of the following criteria: (a) absence of voltage or (b) low‐voltage abnormality with bipolar voltage amplitude, less than or equal to 0.2 mV was defined as a dense scar as reported previously …”

2019 APHRS expert consensus statement on three‐dimensional mapping systems for tachycardia developed in collaboration with HRS, EHRA, and LAHRS

“…Tung et al demonstrated a linear relationship between bipolar voltages and increasing interelectrode spacing, which resulted in smaller low voltage area detected at a fixed threshold . Differences in scar area have been demonstrated in the left atrium when data were acquired with large‐tip single point catheter compared to multielectrode acquisition …”