scholarly journals Epicardial and Endocardial Validation of Conduction Block After Thoracoscopic Epicardial Ablation of Atrial Fibrillation

2020 ◽  
Vol 15 (6) ◽  
pp. 525-531
Author(s):  
Mindy Vroomen ◽  
Bart Maesen ◽  
Justin L. Luermans ◽  
Jos G. Maessen ◽  
Harry J. Crijns ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
Pulmonary Veins ◽  
Conduction Block ◽  
Epicardial Ablation ◽  
Surgical Ablation ◽  
Tissue Edema ◽  
Block Based ◽  
The Right ◽  
Positive Results

Objective It is unknown whether epicardial and endocardial validation of bidirectional block after thoracoscopic surgical ablation for atrial fibrillation is comparable. Epicardial validation may lead to false-positive results due to epicardial tissue edema, and thus could leave gaps with subsequent arrhythmia recurrence. It is the aim of the present study to answer this question in patients who underwent hybrid atrial fibrillation ablation (combined thoracoscopic epicardial and endocardial catheter ablation). Methods After epicardial ablation of the pulmonary veins (PVs) and connecting inferior and roof lines (box lesion), exit and entrance block were epicardially and endocardially evaluated using an endocardial His Bundle catheter and electrophysiological workstation. If incomplete lesions were found, endocardial touch-up ablation was performed. Validation results were also compared to predictions about conduction block based on tissue conductance measurements of the epicardial ablation device. Results Twenty-five patients were included. Epicardial validation results were 100% equal to the endocardial results for the left superior, left inferior, and right inferior PVs and box lesion. For the right superior PV, 85% similarity was found. Based on tissue conductance measurements, 139 lesions were expected to be complete; however, in 5 (3.6%) a gap was present. Conclusions Epicardial bidirectional conduction block in the PVs and the box lesion corresponded well with endocardial bidirectional conduction block. Conduction block predictions by changes in tissue conductance failed in few cases compared to block confirmation. This emphasizes that tissue conduction measurements can provide a rough indication of lesion effectiveness but needs endpoint confirmation by either epicardial or endocardial block testing.

Simultaneous Catheter Mapping of the Pulmonary Veins in Focal Atrial Fibrillation. Significance of Rapid Focal Activation, Effectiveness for Catheter Ablation.

2002 ◽  
Vol 43 (4) ◽  
pp. 357-365 ◽  
Author(s):  
Hideko Nakashima ◽  
Koichiro Kumagai ◽  
Hideaki Tojo ◽  
Tomoo Yasuda ◽  
Hiroo Noguchi ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
Pulmonary Veins ◽  
Catheter Mapping

scholarly journals B-PO01-058 CATHETER ABLATION VS SURGICAL ABLATION IN ATRIAL FIBRILLATION: ANALYSIS OF NATIONAL INPATIENT SAMPLE, 2004-2018

Heart Rhythm ◽  
2021 ◽  
Vol 18 (8) ◽  
pp. S74
Author(s):  
Abdul Mannan Khan Minhas ◽  
Salik Nazir ◽  
Muhammad Hisham Wazir ◽  
Muhammad Osama Muslim
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
National Inpatient Sample ◽  
Surgical Ablation

scholarly journals P-175 Atrial fibrillation susceptibility is decreased after incomplete surgical ablation of the pulmonary veins

EP Europace ◽  
2003 ◽  
Vol 4 (Supplement_2) ◽  
pp. B108-B108
Author(s):  
T.J. van Brakel ◽  
G. Bolotin ◽  
L.W. Nifong ◽  
A.L. Dekker ◽  
T. van der Nagel ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Pulmonary Veins ◽  
Surgical Ablation

Intraoperative CARTO Mapping for Atrial Fibrillation Ablation in Patients Undergoing Cardiac Surgery

2021 ◽  
Author(s):  
Sara Rita Vacirca
Keyword(s):  
Atrial Fibrillation ◽  
Cardiac Surgery ◽  
Heart Surgery ◽  
Pulmonary Veins ◽  
Open Heart Surgery ◽  
Atrial Fibrillation Ablation ◽  
Surgical Ablation ◽  
Before And After ◽  
The Mean ◽  
Exit Block

Objective: Intraoperative CARTO Mapping for Atrial Fibrillation ablation in cardiac surgery. Background: Surgical ablation of Atrial Fibrillation is usually performed without mapping. The study aims to determine if intraoperative CARTO can be useful to guide the ablating procedure. Methods and Findings: Fourteen patients with symptomatic and drug-refractory concomitant AF were operated on in 2003 and 2004. CARTO mapping was performed before and after surgical bipolar radio-frequency ablation. Application of energy was repeated when residual electrical activity was detected at the pulmonary veins-atrial junction. Pacing wires were applied on right and left pulmonary veins distally to the ablation line to confirm the exit block. The mapping protocol was completed in 12 patients. Acute left atrium-pulmonary vein isolation was achieved after single or double energy application in 2/12 (16.6%) and 9/12 (75%) patients, respectively. The mean duration of the mapping and ablation procedure was 67 minutes. At discharge, PV isolation persisted in 10 patients: exit block was confirmed by the absence of pacing through the pulmonary veins electrodes. After a mean follows up of 181 months, no further recurrent AF events were registered in 9/12 (69.2%) patients. Conclusions: CARTO system is useful during open-heart surgery to guide the ablating strategy.

Abstract 16237: Zero Fluoroscopy Ablation of Atrial Fibrillation: A Safety and Feasibility Study

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Luigi Di Biase ◽  
Rodney Horton ◽  
Chintan Trivedi ◽  
Prasant Mohanty ◽  
Sanghamitra Mohanty ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
Pulmonary Veins ◽  
Radiation Risk ◽  
Control Group ◽  
Short Term ◽  
Af Ablation ◽  
And Control ◽  
Zero Fluoroscopy

Introduction: Radiofrequency catheter ablation of atrial fibrillation is performed under fluoroscopic guidance and therefore carries radiation risk exposure for the both the patient and the operator. Three-dimensional mapping systems and newer technologies to allow non-fluoroscopic catheter visualization together with intracardiac echo have reduced but not abolished the fluoroscopy exposure. We aim to demonstrate the feasibility, the safety and the efficacy of catheter ablation for atrial fibrillation without the use of fluoroscopy. Methods: A totally fluoro-less approach was developed for AF ablation at our Institution. 94 consecutive AF patients underwent zero fluoroscopy catheter ablation for atrial fibrillation. In the zero fluoroscopy cases, the fluoroscopy arm was kept far away from the patient table. Access including double trans-septal, mapping with the Carto 3 system and ablation were all performed without fluoroscopy with the use of ICE and the Carto 3 system. These 94 patients were compared with 94 control patients matched for age, sex and type of AF who underwent AF ablation by the same operator with the use of fluoroscopy. Results: Baseline characteristics were similar between fluoroless (N=94, Age=64.5 ± 10.1, 75.5% male, 48% paroxysmal) and control (N=94, Age=65.1 ± 9.9, 72.3% male, 50% paroxysmal) group. Non-PV triggers were detected and ablated in 51 (54.3%) and 56 (59.6%) patients in fluoroless and control group respectively (p=0.5). Average fluoro time in control group was 10.1 ± 4.7 minutes. Procedure duration was comparable (120.4 ± 25.8 vs. 122.2 ± 28.7, p =0.6). After the short term median follow-up of 4.5 (4 – 6.5) months, 10 (10.6 %) patients in flourless and 9 (9.6%) patients in control group experienced recurrences (p=0.8).One pericardial effusion requiring pericardiocenteis occurred in the fluoroless group. Conclusions: Our series show that zero fluoroscopy ablation of atrial fibrillation with the use of newer technologies is feasible, safe and efficacious at the short term follow up. Importantly in our series the double transeptal was performed without fluoroscopy and the ablation was not limited to the pulmonary veins only but included ablation of the posterior wall, the coronary sinus and the left atrial appendage.

Rhythm control: surgical ablation

ESC CardioMed ◽  
2018 ◽  
pp. 2173-2177
Author(s):  
Chawannuch Ruaengsri ◽  
Matthew R. Schill ◽  
Richard B. Schuessler ◽  
Ralph J. Damiano
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
Treatment Option ◽  
Surgical Procedures ◽  
Antiarrhythmic Drugs ◽  
Cardiac Surgical Procedures ◽  
Rhythm Control ◽  
Maze Procedure ◽  
Hybrid Procedures ◽  
Surgical Ablation

Surgical ablation for atrial fibrillation was introduced in 1987 and has since become well established as a treatment option for patients with symptomatic atrial fibrillation refractory to antiarrhythmic drugs and/or catheter ablation or patients who are having concomitant cardiac surgical procedures. The Cox–Maze procedure has been improved upon by modern variations using ablation devices. More limited ablation procedures and hybrid procedures have been introduced, but their efficacy requires further investigation.

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