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 Correlation of left atrial wall thickness and atrial remodeling in atrial fibrillation

Medicine ◽  
2019 ◽  
Vol 98 (15) ◽  
pp. e15170 ◽  
Author(s):  
Kun Zuo ◽  
Kuibao Li ◽  
Min Liu ◽  
Jing Li ◽  
Xiaoqing Liu ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Wall Thickness ◽  
Left Atrial ◽  
Atrial Remodeling ◽  
Atrial Wall ◽  
Left Atrial Wall

1244Feasibility, safety and efficacy of tailoring ablation index to left atrial wall thickness (lawt) during atrial fibrillation ablation. The Ablate By-LAW Study

EP Europace ◽  
2020 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
C Teres ◽  
B Jauregui ◽  
D Soto-Iglesias ◽  
A Ordonez ◽  
A Chauca ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Wall Thickness ◽  
Left Atrial ◽  
Atrial Fibrillation Ablation ◽  
High Rate ◽  
Atrial Wall ◽  
Left Atrial Wall ◽  
Ablation Index ◽  
First Pass ◽  
Catheter Stability

Abstract Funding Acknowledgements Dr Teres was funded by Swiss Heartrhythm Foundation Introduction Circumferential pulmonary vein isolation (PVI) has become a mainstay in the treatment of atrial fibrillation (AF). The utility of ablation index (AI) to dose radiofrequency delivery for the reduction of AF recurrences has already been proven with a target AI ≥ 400 at the posterior wall and ≥550 at the anterior Wall. Nevertheless, the left atrial wall is a thin, heterogeneous structure with an important inter and intra-patient variability of LAWT. Objective To determine if adapting AI to atrial wall thickness (AWT) is feasible, effective and safe during AF ablation. Methods Single-Center study that included 80 consecutive patients referred for a first paroxysmal AF ablation that was performed with a single catheter approach with the intention to reduce vascular access complication rate. 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. All procedures were performed under general anesthesia with a high-rate low-volume ventilation protocol for obtaining higher catheter stability. The transeptal puncture was TEE-guided. During the procedure, the WT map was fused with the LA anatomy using CARTO-merge. LAWT was categorized into 1mm-layers and the AI was titrated to the local atrial WT as follows: Thickness < 1 mm (red): 300; 1-2 mm (yellow): 350; 2-3 mm (green): 400; 3-4 mm (blue): 450; > 4 mm (purple): 450 (Figure). Maximal inter-lesion distance was set at 6 mm. VisiTag settings were: catheter position stability: minimum time 3 s, maximum range 4 mm; force over time: 25%, minimum force 3 g; lesion tag size: 3 mm. Respiration training was not possible due to the high catheter stability.  The circumferential ablation line was designed in a personalized fashion to avoid thicker regions. Results 80 patients [41 (51,2 %) male, age 60± 11 years] were included. Mean LVEF was 59 ± 5 %, Mean LA diameter 39,1 ± 5,8 mm, Mean LAWT was 1.36 ± 0.63 mm. Mean AI was 352 ± 36 on the RPVs and 356 ± 36 on the LPVs. Procedure time was 60,0 min (IQR 51-70). Fluoroscopy time was 58,5 s (35-97,5). First pass isolation was obtained in 72 (90%) of the RPVs and 75 (93,8%) of the LPVs. Conclusions the present study, assessing a novel, personalized protocol for radiofrequency titration during atrial fibrillation ablation, shows a high rate of first pass isolation with a lower need for RF energy delivery and lower procedure requirements, as compared to previous PV ablation protocols. Further studies are needed to evaluate the long-term results of this approach. Abstract Figure. LAWT-map Visitag points with tailored AI

Histological assessment of transmurality after repeated radiofrequency ablation of the left atrial wall

2014 ◽  
Vol 62 (7) ◽  
pp. 428-433 ◽  
Author(s):  
Satoru Wakasa ◽  
Suguru Kubota ◽  
Yasushige Shingu ◽  
Hiroki Kato ◽  
Tomonori Ooka ◽  
...  
Keyword(s):  
Radiofrequency Ablation ◽  
Left Atrial ◽  
Atrial Wall ◽  
Histological Assessment ◽  
Left Atrial Wall

scholarly journals Thickening of the Left Atrial Wall Shortly After Radiofrequency Ablation Predicts Early Recurrence of Atrial Fibrillation

2010 ◽  
Vol 74 (8) ◽  
pp. 1538-1546 ◽  
Author(s):  
Miki Yokokawa ◽  
Hiroshi Tada ◽  
Keiko Koyama ◽  
Toshihiko Ino ◽  
Shigeto Naito ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Radiofrequency Ablation ◽  
Left Atrial ◽  
Early Recurrence ◽  
Atrial Wall ◽  
Left Atrial Wall

Impacts of the body size on the left atrial wall thickness and atrial fibrillation recurrence after catheter ablation

2019 ◽  
Vol 34 (8) ◽  
pp. 1351-1359 ◽  
Author(s):  
Yosuke Nakatani ◽  
Tamotsu Sakamoto ◽  
Yoshiaki Yamaguchi ◽  
Yasushi Tsujino ◽  
Naoya Kataoka ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Body Size ◽  
Catheter Ablation ◽  
Wall Thickness ◽  
Left Atrial ◽  
The Body ◽  
Atrial Fibrillation Recurrence ◽  
Atrial Wall ◽  
Left Atrial Wall
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