Epicardial radiofrequency ablation of ventricular myocardium: mechanisms of lesion formation and damage to adjacent structures
نویسندگان
چکیده
منابع مشابه
Impedance During Radiofrequency Ablation of Ventricular Myocardium
The purpose of this study was to correlate changes in electrical impedance with the electrode-tissue interface temperature and to characterize the associated events occurring at the catheter tip electrode. In a canine model, lesions were created in vitro (n =49) and in vivo (n =31) and radiofrequency power settings were varied. Electrode-tissue interface temperature, delivered current, and volt...
متن کامل[Percutaneous epicardial radiofrequency ablation of idiopathic ventricular tachycardia].
We describe 3 patients with ventricular tachycardia in whom epicardial ablation was done after prior attempts of endocardial ablation had failed. Clinical ventricular tachycardia originated at the right ventricular outflow tract in one patient and near the mitral annulus in another patient. In these two cases ventricular tachycardia was mapped and successfully ablated with a percutaneous subxip...
متن کاملFeasibility of Rapid Linear-Endocardial and Epicardial Ventricular Ablation Using an Irrigated Multipolar Radiofrequency Ablation Catheter.
BACKGROUND A common strategy for ablation of scar-based ventricular tachycardia is delivering multiple lesions in a linear pattern. METHODS AND RESULTS We tested the efficacy of a novel linear irrigated multipolar ablation catheter capable of creating linear lesions with a single application. Healthy swine underwent endocardial and epicardial linear ablation using a novel linear irrigated abl...
متن کاملEndocardial and Epicardial Radiofrequency Catheter Ablation
Myocarditis is simply defined as an inflammatory condition mainly located in the heart muscle, although considerable uncertainties still persist as to its etiologic, pathological, and clinical subclassifications. In addition to the possibility of an aspecific flulike prodrome, possible presentations include different degrees of heart failure (ranging from cardiogenic shock to subtly progressive...
متن کاملEpicardial Radiofrequency Ablation Failure During Ablation Procedures for Ventricular Arrhythmias: Reasons and Implications for Outcomes.
BACKGROUND Radiofrequency ablation (RFA) from the epicardial space for ventricular arrhythmias is limited or impossible in some cases. Reasons for epicardial ablation failure and the effect on outcome have not been systematically analyzed. METHODS AND RESULTS We assessed reasons for epicardial RFA failure relative to the anatomic target area and the type of heart disease and assessed the effe...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 2002
ISSN: 0735-1097
DOI: 10.1016/s0735-1097(02)80421-1