scholarly journals Relationship between Surpoint Tag Index, a Radiofrequency Ablation lesion quality indicator, and Atrial wall thickness in Cavotricuspid isthmus Ablations exhibiting bidirectional block

2021 ◽  
Author(s):  
Alexander Smith ◽  
Anish K. Amin ◽  
Rayan El‐Zein ◽  
Sreedhar R. Billakanty ◽  
Nagesh Chopra
Keyword(s):  
Radiofrequency Ablation ◽  
Wall Thickness ◽  
Quality Indicator ◽  
Ablation Lesion ◽  
Atrial Wall ◽  
Cavotricuspid Isthmus

scholarly journals Effect of Left Atrial Wall Thickness on Radiofrequency Ablation Success

2016 ◽  
Vol 27 (11) ◽  
pp. 1298-1303 ◽  
Author(s):  
JIRO INOUE ◽  
ALLAN C. SKANES ◽  
LORNE J. GULA ◽  
MARIA DRANGOVA
Keyword(s):  
Radiofrequency Ablation ◽  
Wall Thickness ◽  
Left Atrial ◽  
Atrial Wall ◽  
Left Atrial Wall ◽  
Ablation Success

scholarly journals Right coronary artery wall edema provoked by cavotricuspid isthmus radiofrequency ablation

2017 ◽  
Vol 3 (9) ◽  
pp. 443-446
Author(s):  
Takuro Nishimura ◽  
Masahiko Goya ◽  
Shinya Shiohira ◽  
Takakatsu Yoshitake ◽  
Yasuhiro Shirai ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Radiofrequency Ablation ◽  
Right Coronary Artery ◽  
Artery Wall ◽  
Cavotricuspid Isthmus ◽  
Coronary Artery Wall

659Left atrial wall thickness evaluation during atrial fibrillation redo procedures

EP Europace ◽  
2020 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
C Teres ◽  
D Soto ◽  
B Jauregui ◽  
D Penela ◽  
A Ordonez ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Wall Thickness ◽  
Atrial Wall ◽  
Ablation Procedure ◽  
Left Atrial Wall ◽  
Local Distance ◽  
The Mean ◽  
The Right ◽  
The Relationship ◽  
Funding Acknowledgements

Abstract Funding Acknowledgements Dr Teres was funded by Swiss Heartrhythm Foundation Introduction pulmonary vein (PV) reconnections due to gaps on circumferential ablation lines are responsible for atrial fibrillation recurrences after catheter ablation. We sought to analyze the local left atrial wall thickness (LAWT) of PV line gaps at AF redo ablation during real-time catheter positioning. LAWT was measured on the MDCT 3D reconstruction and fused with the LA anatomy using CARTO-merge. Objective To analyze the relationship between local reconnection gaps and the LAWT during AF redo procedures. Methods Single-Center cohort study that included 41 consecutive patients referred for AF redo procedure. All patients had a MDCT prior to the ablation procedure. LAWT maps were semi-automatically computed from the MDCT as the local distance between the LA endo and epicardium. Each PV line was subdivided into 8 segments and mean LAWT was computed. During the procedure, the local gap was defined as the earliest activation site at the reconnected segment of the circumferential PV line (Figure 1A & 1B). Results 41 patients [31 (75.6%) male, age 60 ± 10 years] were included. Mean LAWT was 1.36 ± 0.20 mm. Mean PV circumferential line WT was higher in left PVs than in the right PVs 1.68 ± 0.57 vs. 1.31 ± 0.39 mm p < 0.001 respectively. Mean WT of the reconnected points was 44% higher than the mean WT of the segment where the reconnection was located. Mean reconnection point WT was at the 87th percentile of the circumferential line in the LPVs and at the 76th percentile in the RPVs. The reconnected point WT was higher in the LPVs than RPVs 2.13 ± 1.14 vs. 1.47 ± 0.48 mm p < 0.001 respectively.  The most frequent location for reconnections was the left anterior carina (71%), with a mean WT of 2.24 ± 0.91mm; and the right anterior carina (56%) with a mean WT of 1.57 ± 0.62mm (Figure 2A & 2B). Conclusions Reconnection points were more frequently present in the thicker segments of the PV circumferential line. The most frequently reconnected segment was the anterior carina in both right and left PVs. Atrial wall thickness maps derived from MDCT are useful to guide AF redo procedures. Abstract Figure. 1) Activation & WT map; 2) Segment WT

scholarly journals Real-time atrial wall imaging during radiofrequency ablation in a porcine model

Heart Rhythm ◽  
2015 ◽  
Vol 12 (8) ◽  
pp. 1827-1835 ◽  
Author(s):  
Mathieu Granier ◽  
Pierre François Winum ◽  
Mireille Granier ◽  
Pierre Liaud ◽  
Guillaume Cayla ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Real Time ◽  
Porcine Model ◽  
Atrial Wall ◽  
Wall Imaging

Effects of Blood Flow on Radiofrequency Ablation of Tumors: Finite Elements and In Vitro Models

2003 ◽  
Author(s):  
Juan R. Cebral ◽  
Orlando Soto ◽  
Robert J. Lutz ◽  
Bradford J. Wood
Keyword(s):  
Blood Flow ◽  
Radiofrequency Ablation ◽  
Saline Solution ◽  
Numerical Models ◽  
In Vitro Models ◽  
Collective Effects ◽  
Ablation Lesion ◽  
Thermal Flow ◽  
Flow Process

The efficacy of radiofrequency ablation (RFA) treatments depends on the ability to ablate tumors completely while minimizing the damage to healthy tissue. Tissue cooling due to blood flow is an important factor affecting the size and shape of the ablation lesion. In this paper a new methodology for finite element modeling of the coupled electrical-thermal-flow process during RFA is presented. Our formulation treats heat losses due to blood flow explicitly rather than approximating the collective effects of blood vessles as a heat sink. Numerical models were compared to in vitro models using egg whites to simulate human tissue and a straight cylinder filled with a saline solution to simulate blood. Asymmetric burns were obtained close to the simulated blood vessels. Numerical results closely match the in vitro models.

Radiofrequency ablation lesion assessment using optical coherence tomography – a proof‐of‐concept study

2019 ◽  
Vol 30 (6) ◽  
pp. 934-940 ◽  
Author(s):  
Deming Liang ◽  
Dominik Taeschler ◽  
Christine Goepfert ◽  
Patrik Arnold ◽  
Adrian Zurbuchen ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Radiofrequency Ablation ◽  
Optical Coherence ◽  
Ablation Lesion ◽  
Proof Of Concept ◽  
Concept Study
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