Feasibility of the transseptal approach for fast and unstable left ventricular tachycardia mapping and ablation with a non-contact mapping system

Abstract

A transseptal approach can be a feasible and effective alternative approach for mapping and ablation of fast and unstable left VT with a non-contact mapping system.

Radiofrequency Catheter Ablation of Atrial Tachycardia Under Navigation Using the EnSite Array

“…[9][10][11][12][13][14][15][16][17] In short, the EA (St Jude Medical, Minnetonka, MN, USA) consists of a multi-electrode array catheter and a custom-designed amplifier system connected to a Silicon Graphics workstation running specially designed system software. The system simultaneously reconstructs more than 3,300 virtual unipolar electrograms and displays them as 3D graphical images of the chamber of interest in isochronal or isopotential mode.…”

“…The pathway exit was also elucidated by the virtual activation map in which an rS pattern was demonstrated in the VUE. 11 In patients mapped with EnSite version 6.0J (n=18), contact bipolar voltage mapping was performed during sinus rhythm to identify the AT substrate. In some patients with reentrant AT, entrainment pacing was performed to confirm the reentrant circuit, taking care not to transform the AT into another pattern.…”

Radiofrequency Catheter Ablation of Ventricular Tachyarrhythmia Under Navigation Using EnSite Array

“…19 It should be placed in accordance with the suspected critical region, such as sites near the infarcted areas in patients with old myocardial infarction, as shown in Figures 1C,D. We positioned MEA into LV via an antegrade trans-septal approach for anterior and/ or lateral infarction, and a retrograde transaortic approach for inferior, posterior, and/or septal infarction so that MEA would be closer to the areas of interest.…”

Radiofrequency Catheter Ablation with the Use of a Noncontact Mapping System for Ventricular Tachycardia Originating from the Aortic Sinus Cusp —A Case Report—

“…[1][2][3][4][5][6][7][8] However, the efficacy of the noncontact mapping system in radiofrequency catheter ablation (RFCA) of idiopathic ventricular tachycardia (VT) is still unclear. Here we describe a case in which an idiopathic VT originating from the left aortic sinus cusp (ASC) was eliminated by RFCA under navigation using the NCM.…”

“…[1][2][3][4][5][6][7][8] During the review of the recorded data, a high-pass filter setting of 8.0 Hz was used for the isopotential map created by the NCM. 8) During the dynamic wavefront map of the LV and ASC, the earliest activation was identified at the left coronary cusp (LCC), from which the activation proceeded slowly toward the LV septum, and then rapidly to the entire LV.…”