نتایج جستجو برای: ablation
تعداد نتایج: 49404 فیلتر نتایج به سال:
AIM To identify predictors of need for repeat procedures after initial atrial fibrillation (AF) ablation. METHODS We identified a cohort undergoing first time AF ablation at our institution from January 2004 to February 2014 who had cardiac magnetic resonance (CMR) imaging performed prior to ablation. Clinical variables and anatomic characteristics (determined from CMR) were assessed as predi...
BACKGROUND Despite technical refinements and improved long-term efficacy of the ablation procedure for treating AFL (AFL), the subsequent occurrence of AF (AF) following this procedure remains a significant clinical problem. OBJECTIVES To determine long-term incidence and predictors of AF after catheter ablation of typical AFL. MATERIAL AND METHODS Between March 2005 and February 2010, a to...
AIMS We aimed to determine how many electrical cardioversions (ECs) should be applied to treat repetitive persistent recurrences of atrial fibrillation (AF) following ablation of persistent AF within the early post-procedural period. METHODS AND RESULTS A total of 40 patients with >1 episode of recurrent AF in the form of persistent atrial arrhythmias within 3 months following the ablation we...
Recent decades have seen a paradigm shift in the treatment of liver tumours from invasive surgical procedures to minimally invasive image-guided ablation techniques. Magnetic resonance-guided high-intensity focused ultrasound (MR-HIFU) is a novel, completely non-invasive ablation technique that has the potential to change the field of liver tumour ablation. The image guidance, using MR imaging ...
Background: Ablation for atrial fibrillation (AF) is a widely-accepted treatment for this arrhythmia. Ablation is traditionally reserved for second-line therapy in patients who have failed drug therapy, but it may be ready for first-line treatment. Objective: This article outlines the rationale for using ablation as first-line therapy for AF. Findings: AF increases both morbidity and mortality....
The use of catheter ablation to treat AF is increasing rapidly, but there is presently an incomplete understanding of its cost-effectiveness. AF ablation procedures involve significant up-front expenditures, but multiple randomized trials have demonstrated that ablation is more effective than antiarrhythmic drugs at maintaining sinus rhythm in a second-line and possibly first-line rhythm contro...
A 54-year-old man was referred for ablation of symptomatic drug-refractory long-lasting persistent atrial fibrillation. His past medical history was negative for cardiac disease but included a diagnosis of esophageal achalasia. The patient underwent an ablation procedure, guided by barium esophagram, including isolation of the pulmonary veins, ablation of complex fractionated left atrial electr...
OBJECTIVES This study sought to determine the characteristics of atrial electrograms predictive of slowing or termination of atrial fibrillation (AF) during ablation of chronic AF. BACKGROUND There is growing recognition of a role for electrogram-based ablation. METHODS Forty consecutive patients (34 male, 59 +/- 10 years) undergoing ablation for chronic AF persisting for a median of 12 mon...
BACKGROUND In animal studies of radiofrequency ablation, lesion sizes plateau as the maximum lesion size is reached for an ablation. Lesion parameters are not available in clinical ablations, but preclinical work suggests that these correlate with impedance drop and electrogram attenuation. Characterization of the relationships between catheter contact force, ablation duration, and these surrog...
AIMS Pulmonary vein isolation (PVI) is the cornerstone of catheter ablation of atrial fibrillation (AF). The intervenous ridge (IVR) may be incorporated into ablation strategies to achieve PVI; however, randomized trials are lacking. We performed a randomized multi-centre international study to compare the outcomes of (i) circumferential antral PVI (CPVI) alone (minimal) vs. (ii) CPVI with IVR ...
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