Effect of Inter‐electrode Distance on Bipolar Intramural Radiofrequency Ablation

Abstract

Using the above parameters (electrode radius, RF power delivery, time) during bipolar ablation, lesion continuity was critically dependent on the ILD. The maximum ILD threshold to create contiguous overlapping lesions was 3 mm. Lesions of greater width were created using shorter ILDs. Clinically, greater control over lesion dimensions can be obtained by manipulating the ILD distance.

Use of Bipolar Radiofrequency Catheter Ablation in the Treatment of Cardiac Arrhythmias

“…Since then, following in vitro and animal studies have been published that compared the efficacy of BPA and UPA in the treatment of VT [6, 7, 13, 21]. Chang et al .…”

“…More recently, Kovoor et al . [21] tested the correlation between inter-electrode distance with lesion dimensions and continuity while using the BPA setting. In the study, intramural ablations on greyhounds were performed to ensure the proper contact of ablation electrode and adjacent myocardium.…”

“…The inter-electrode distance was positively correlated to lesion depth and negatively correlated to lesion width. The maximum inter-electrode distance to create a contiguous lesion was 3 mm [21].…”

Comparison between biparietal bipolar and uniparietal bipolar radio frequency ablation techniques in a simultaneous procedural setting

“…Likewise, the lesion depth (A TOT , V TOT ) resulted wider in uniparietal setting than the biparietal one. These results may be clarified with the evidence that the RF current density is inversely proportional to the square of the distance between the electrodes, and the density is higher along the shortest distance between the electrodes [21][22][23]. As a consequence, the closeness of the poles when in the biparietal setting may result in a better spread through the wall tissue instead of uniparietal bipolar mode.…”

Cardiology at Westmead Hospital from 1990 to 2007

“…Daly (while doing PhD at University of Technology and Westmead Hospital), Mr. Ilija Koevsky (Biomedical Engineering, Westmead Hospital) and the current author developed multielectrode needles capable of transmural mapping and multielectrode temperature-controlled radiofrequency ablation. 16,17 An international patent exists for this Westmead invention. A radiofrequency ablation system capable of simultaneous multi-electrode ablation was developed using an AMLAB system as part of the CRC Project by Daly with support from Hatzianestis, Ross and the current author.…”