Epicardial ablation of ventricular tachycardia using a new high-density mapping system

Publication date: December 2019Source: Revista Portuguesa de Cardiologia (English Edition), Volume 38, Issue 12Author(s): Diogo Cavaco, Pedro Carmo, João Mesquita, Maurício Scanavacca, Pedro Adragão
Source: Revista Portuguesa de Cardiologia - Category: Cardiology Source Type: research

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AbstractIntroductionDespite technical progress, ventricular tachycardia (VT) recurrence after unipolar ablation remains relatively high (12% ‐47%). Bipolar ablation has been proposed as an appealing solution that may overcome limitations associated with unipolar ablation settings. We designed an animal study to compare bipolar (BPA) vs sequential unipolar ablation (UPA) using contact force‐sensing technology on both ablation catheter s.MethodsTwenty large white female pigs (6 ‐months‐old, 50–60 kg) underwent multiple RF ablations (30 W, 60 seconds, 30 mL/min irrigation) on the vent...
Source: Journal of Cardiovascular Electrophysiology - Category: Cardiology Authors: Tags: ORIGINAL ARTICLE Source Type: research
AbstractIntroductionDespite technical progress, ventricular tachycardia (VT) recurrence after unipolar ablation remains relatively high (12 –47%). Bipolar ablation has been proposed as an appealing solution that may overcome limitations associated with unipolar ablation settings.We designed an animal study to compare bipolar (BPA) vs sequential unipolar ablation (UPA) using contact force sensing technology on both ablation catheters.MethodsTwenty large white female pigs (6 months old, 50 ‐60 kg) underwent multiple RF ablations (30 W, 60 s, 30 ml/min irrigation) on the ventricular myocardium from the epicardial and ...
Source: Journal of Cardiovascular Electrophysiology - Category: Cardiology Authors: Tags: ORIGINAL ARTICLE Source Type: research
Epicardial mapping and ablation are frequently necessary to eliminate ventricular tachycardia (VT) in Chagas disease patients. Nonetheless, there are no randomized controlled trials demonstrating the role of this strategy.
Source: Heart Rhythm - Category: Cardiology Authors: Source Type: research
ConclusionCA of drug ‐refractory VT in CS is effective, often requiring the epicardial approach. Incomplete success and recurrence of VT were higher in the inflammatory phase of the disease.
Source: Journal of Cardiovascular Electrophysiology - Category: Cardiology Authors: Tags: ORIGINAL ARTICLE Source Type: research
ConclusionCatheter ablation of drug ‐refractory VT in CS is effective, often requiring epicardial approach. Incomplete success and recurrence of VT was higher in the inflammatory phase of the disease.This article is protected by copyright. All rights reserved.
Source: Journal of Cardiovascular Electrophysiology - Category: Cardiology Authors: Tags: ORIGINAL ARTICLE Source Type: research
ConclusionsThe endocardium/epicardium MBF gradient at stress is significantly lower in HCM patients with NSVT. This provides a novel approach to further refine risk stratification of sudden cardiac death.
Source: IJC Heart and Vasculature - Category: Cardiology Source Type: research
Abstract BACKGROUND: To investigate the relationship between the extracellular volume fraction (ECV) measured using cardiac magnetic resonance (CMR) T1 mapping and cardiac events in symptomatic adults with tetralogy of Fallot (TOF). METHODS: A total of 60 consecutive symptomatic adults (35.4±13.8 years old) with repaired TOF who were in New York Heart Association functional class 2-4 were prospectively enrolled. Native T1 values and ECV of the free walls of the right ventricle (RV), the left ventricle, and the ventricular septum were obtained by CMR T1 mapping using a 3.0T scanner and the saturation re...
Source: Journal of Cardiology - Category: Cardiology Authors: Tags: J Cardiol Source Type: research
Stroke involving some areas of the cerebral hemisphere, such as insula, amygdala, and lateral hypothalamus, may cause changes in autonomic control of cardiac function. A 58-year-old woman presented to the emergency department for acute onset of left facial-brachial-crural hemiparesis and dysarthria. A brain CT scan showed subacute ischemic lesion with hemorrhagic infarction in right insular-rolandic cortex. Over the next few days ECG showed severe bradycardia with elongation of QTc, significative pauses (5 seconds), runs of nonsustained ventricular tachycardia and torsades de pointes.
Source: Journal of Stroke and Cerebrovascular Diseases - Category: Neurology Authors: Tags: Case Report Source Type: research
AbstractCardiac sarcoidosis (CS) causes lethal arrhythmia and heart failure and has a poor prognosis; therefore, early detection and early stage treatment are important. However, diagnosis of isolated CS may be difficult in some cases owing to the low sensitivity of myocardial biopsy. Herein, we describe the case of a patient with isolated CS, showing change from negative to positive fluorine ‐18 fluorodeoxyglucose (18F ‐FDG) positron emission tomography (PET) uptake results within 9 months. The patient showed rapid reduction in left ventricular systolic function with sustained ventricular tachycardia. The diagnos...
Source: ESC Heart Failure - Category: Cardiology Authors: Tags: Case Report Source Type: research
Ventricular tachycardia (VT), which could lead to sudden cardiac death, occurs frequently in patients with myocardial infarction. Computational modeling has emerged as a powerful platform for the non-invasive investigation of lethal heart rhythm disorders in post-infarction patients and for guiding patient VT ablation. However, it remains unclear how VT dynamics and predicted ablation targets are influenced by inter-patient variability in action potential duration (APD) and conduction velocity (CV). The goal of this study was to systematically assess the effect of changes in the electrophysiological parameters on the induc...
Source: Frontiers in Physiology - Category: Physiology Source Type: research
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