Aug 13, 2015 Mitral isthmus line 3. Mitral annular line 4. CS ostium ablation 5. Cavo-tricuspid isthmus line. Ablation History: Refer to EP lab generated report

BACKGROUND Perimitral flutter (PMF) is a common form of left atrial tachycardia after atrial fibrillation (AF) ablation. The mitral isthmus (MI) is the standard

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 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 ablation of a mitral isthmus (MI) atrial ﬂutter. Case report A 73-year-old man with paroxysmal atrial ﬁbrillation under-went catheter ablation. After the 4 PVs were completely iso-lated, the rhythm converted to persistent ﬂutter with a cycle length of 334 ms. A mitral isthmus (MI) linear lesion created in a reanimated human heart: (A) initiation of the linear lesion with support from a transseptal sheath and secondary diagnostic catheter; (B) the ablation catheter (1) is pulled along the MI with twisting of a diagnostic catheter (2) towards the fossa ovalis, and retraction of the transseptal sheath (3) from the left atrium; (C) increased deflection Mitral Isthmus Ablation Line Reconnections Are Common and Predicts Mitral Annular Dependent Flutters Following Pulmonary Vein Isolations for Atrial Fibrillation December 2011 Journal of Arrhythmia catheter (Map) along the superior mitral isthmus at the base of the LAA in a RAO 30°/caudal 15° projection.

It is well recognised however, that mitral isthmus ablation is ablation of a mitral isthmus (MI) atrial ﬂutter. Case report A 73-year-old man with paroxysmal atrial ﬁbrillation under-went catheter ablation. After the 4 PVs were completely iso-lated, the rhythm converted to persistent ﬂutter with a cycle length of 334 ms. A mitral isthmus (MI) linear lesion created in a reanimated human heart: (A) initiation of the linear lesion with support from a transseptal sheath and secondary diagnostic catheter; (B) the ablation catheter (1) is pulled along the MI with twisting of a diagnostic catheter (2) towards the fossa ovalis, and retraction of the transseptal sheath (3) from the left atrium; (C) increased deflection Mitral Isthmus Ablation Line Reconnections Are Common and Predicts Mitral Annular Dependent Flutters Following Pulmonary Vein Isolations for Atrial Fibrillation December 2011 Journal of Arrhythmia 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).

Once OAT is induced, it is characterized by surface 12-lead electrocardiogram, as well as entrainment and activation mapping. 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.

An anterior ablation line, connecting the right upper pulmonary vein with anterior mitral annulus, including the scar area, was acomplished in 73% (n=11). In 82% of these (n=9), conversion to sinus rhythm (SR) was obtained with the first RF ablation set; effective mitral isthmus block (MIB) was achieved in all except 1 (technical limitations).

Radiofrequency Catheter Ablation Targeting the Vein of Marshall in Difficult Mitral Isthmus Ablation or Pulmonary Vein Isolation. Lee JH(1), Nam GB(1), Kim M(1), Hwang YM(1), Hwang J(1), Kim J(1), Choi KJ(1), Kim YH(1).

A mitral isthmus (MI) linear lesion created in a reanimated human heart: (A) initiation of the linear lesion with support from a transseptal sheath and secondary diagnostic catheter; (B) the ablation catheter (1) is pulled along the MI with twisting of a diagnostic catheter (2) towards the fossa ovalis, and retraction of the transseptal sheath (3) from the left atrium; (C) increased deflection

3. Discussion Cardiac surgeons were the pioneers of curative ablation of atrial fibrillation (AF). Since the 80’s, when Cox and colleagues introduced the LA isolation pro- After circumferential pulmonary vein isolation and roof line ablation, mitral isthmus ablation was performed during left atrial appendage pacing using an irrigated ablation catheter (endocardium: maximum power: 40/50 W, maximum temperature: 48°C; CS: maximum power: 25/30 W, maximum temperature: 48°C). An anterior ablation line, connecting the right upper pulmonary vein with anterior mitral annulus, including the scar area, was acomplished in 73% (n=11). In 82% of these (n=9), conversion to sinus rhythm (SR) was obtained with the first RF ablation set; effective mitral isthmus block (MIB) was achieved in all except 1 (technical limitations). 2015-08-25 Epicardiac conduction via the vein of Marshall (VOM) can bypass the mitral isthmus (MI) line, making MI ablation difficult. This study aimed to assess the contribution of … Mitral isthmus ablation forms part of the electrophysiologist’s armoury in the catheter ablation treatment of atrial fibrillation.

Risken of the cavotricuspid isthmus: a meta-analysis. 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. All patients had circumferential pulmonary vein isolation (PVI), roof, and MI ablation.
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2011-01-28 2012-03-07 Background: There are limited data on the use of a remote robotic catheter system (RCS) for mitral isthmus (MI) ablation.

OBJECTIVE: This study investigates whether balloon occlusion of CS facilitates mitral isthmus ablation. Mitral isthmus ablation is an established strategy in the treatment of peri-mitral atrial flutter and as an adjunct to pulmonary vein isolation.
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A mitral isthmus (MI) linear lesion created in a reanimated human heart: (A) initiation of the linear lesion with support from a transseptal sheath and secondary diagnostic catheter; (B) the ablation catheter (1) is pulled along the MI with twisting of a diagnostic catheter (2) towards the fossa ovalis, and retraction of the transseptal sheath (3) from the left atrium; (C) increased deflection

Asirvatham S and Stevenson W (2016) Inequalities for Left Atrial Ablation , Circulation: Arrhythmia and Electrophysiology , 9 :1 , Online publication date: 1-Jan We examined the frequency with which a slow conduction zone within the mitral isthmus was critical to the maintenance of ventricular tachycardia associated with remote inferior infarction in patients undergoing catheter ablation. METHODS AND RESULTS: In 4 of 12 patients, a critical zone of slow conduction was identified within the mitral isthmus.

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This study included 143 consecutive patients with nonparoxysmal atrial fibrillation who underwent initial MI ablation.