Following mitral valve surgery (MVS), the left atrium may undergo reverse thoracoscopic left atrial epicardial (TTLAE) ablation technique in patients with severely 0.68 cm; distal arch: 2.90 ± 0.60 cm/3.40 ± 0.50 cm; isthmus,

Background: There are limited data on the use of a remote robotic catheter system (RCS) for mitral isthmus (MI) ablation. Methods: This single-center, prospective, matched control study included 45 patients who underwent atrial fibrillation ablation using a remote RCS compared to 45 patients who underwent conventional ablation.

2015-08-25 Mitral isthmus ablation forms part of the electrophysiologist’s armoury in the catheter ablation treatment of atrial fibrillation. It is well recognised however, that mitral isthmus ablation is technically challenging and incomplete ablation may be pro-arrhythmic, leading some to question its role. Because of the unstable catheter contact during mitral isthmus ablation, a deflectable long sheath is often used during the procedure. Some cases require epicardial ablation in the CS opposite the endocardial line to achieve a complete mitral isthmus block.

Purpose: The purpose of this study is to evaluate the use of a high-resolution mapping system to identify and localize residual endocardial and epicardial conduction after MI linear ablation. catheter (Map) along the superior mitral isthmus at the base of the LAA in a RAO 30°/caudal 15° projection. A multipolar electrode catheter was positioned in the coronary sinus (CS). In C, a circular mapping catheter was positioned inside the LAA to continuously monitor electric LAA activation during ablation of a mitral isthmus line.

2015-08-25 Mitral isthmus ablation forms part of the electrophysiologist’s armoury in the catheter ablation treatment of atrial fibrillation.

Linear mitral annular ablation was then delivered. Eventually, the ablation catheter was withdrawn to the right side and used to map the right atrium. RA activation appeared to be counterclockwise but was not entrained from the right side. Linear isthmus ablation was performed. The left side was then re-accessed readily with the pacing wire.

It is well recognised however, that mitral isthmus ablation is Background: The mitral isthmus is a critical part of perimitral reentrant tachycardia, as well as an important substrate of persistent atrial fibrillation. Deployment of an endocardial mitral isthmus line (MIL) with the end point of bidirectional block may be challenging and often requires additional epicardial ablation within the coronary sinus. Mitral isthmus ablation: A hierarchical approach guided by electroanatomic correlation.

2021-04-05 · PV electrical isolation and cavotricuspid and mitral isthmus ablation were performed. Their clinical outcome was compared with that of 100 consecutive patients undergoing ablation for the same indications, treated by PV electrical isolation and cavotricuspid ablation, without mitral isthmus ablation from April to December 2001.

J Am Coll Ablation är en effektiv och säker behandling av förmaksfladder för symtomatiska patienter (gott isthmus: a meta-analysis.

We aimed to assess the benefit of RF ablation targeting the vein of Marshall (VOM) in failed cases of MI block or PVI. catheter (Map) along the superior mitral isthmus at the base of the LAA in a RAO 30°/caudal 15° projection. A multipolar electrode catheter was positioned in the coronary sinus (CS).
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Ablation distal (ABL d) is located in the CS at the thickest (8 mm) portion of the mitral isthmus. CSd 5 coronary sinus distal; CSp 5 coronary sinus proximal; LS 5 PentaRay catheter located in the left atrial appendage. Flautt et al Left Atrial ICE Guiding Mitral Isthmus Ablation 81 Background: The mitral isthmus is a critical part of perimitral reentrant tachycardia, as well as an important substrate of persistent atrial fibrillation.

Objective: We A patient with symptomatic typical atrial flutter (AFL) underwent right atrial isthmus ablation with an 8-mm catheter.
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The results of mapping and pacing at the successful ablation site in each of the four patients with mitral isthmus tachycardia are summarized in Table 2. In each patient, data during both left bundle and right bundle tachycardias were examined at the same or nearly identical site, and a single radiofrequency application delivered during one of the two tachycardias rendered both morphologies

The intracardiac echocardiography catheter (ICE) in the LA can be seen projecting a second image of the mitral isthmus and coronary sinus (CS). Mitral isthmus ablation is an established strategy in the treatment of peri-mitral atrial flutter and as an adjunct to pulmonary vein isolation.

2015-12-23

The best threshold to predict MI ablation failure was 8.3 mm with a sensitivity of 67% and a specificity of 97%. Left atrial size was of greater importance in failed cases (2D echo surface: 24.1 ± 2.5 vs. 32.5 ± 6.9 cm2, P = 0.005; electroanatomic volume: 124 ± 32 vs. 165 ± 23 mL, P = 0.02). Mitral isthmus (MI) ablation was limited due to technical challenges in the index ablation for long‐standing persistent atrial fibrillation (LPeAF). The role of adjunctive MI ablation was controversial.

Subsequently, linear ablation of a left atrial roof and the mitral isthmus (MI) was performed. The MI ablation was applied from the 4 o’clock direction of the mitral annulus (MA) to the left-side Anousheh, R, et al. Effect of mitral isthmus block on development of atrial tachycardia following ablation for atrial fibrillation. PACE , Vol. 33, April 2010, pp. 460-68, Editor’s comment: This study clearly shows that the circumferential, anatomically-guided PVI procedure is associated with a substantial risk of post-procedure atrial tachycardia which may need a repeat ablation to fix.