View clinical trials related to Ventricular Tachycardia.
Filter by:This study compares two arms - the current standard of care catheter ablation for Ventricular Tachycardia compared to stereotactic radiotherapy to non-invasively ablate ventricular tachycardia using a novel non-invasive ECG based body surface mapping technology. This allows investigators to identify ventricular tachycardia circuits to target for subsequent radio ablation. To summarize, the current standard of care invasive catheter ablation to the non-invasive radio ablation.
This is an observational study of 10 Chagas Disease patients with Ventricular Tachycardia that have failed prior catheter ablation or have this procedure contraindicated due to clinical status. Those patients will underwent to Stereotactic Body Radiation Therapy (SBRT) targeting the area of the heart of the VT circuits. Radioablation target will be defined based on prior ablation electroanatomical mapping, VT morphology, pre-acquired imaging (CT angiogram, Cardiac Magnetic Resonance), current imaging reconstructed and integrated to electroanatomical mapping and a EP study to define current VT morphologies. Gross targeted volume (GTV), internal targeted volume (ITV) and planning targeted volume (PTV) will be defined and calculated and a single 25Gy dose will be delivered to the PTV. Patients will be followed initially for one year and efficacy endpoint will be rate of VT recurrence, time to recurrence and VT burden. Safety endpoint will be the occurrence of any adverse effect related to SBRT.
The multicenter Cardiology Monitoring Platform registry (mCMP-registry) is a prospective observational registry including multi-omics (diagnostic) measurements performed as part of routine clinical care, bio-banking (optional), and yearly questionnaires (optional). It's objective is to optimize (early) diagnosis and risk-stratification of (early) cardiovascular diseases, specifically cardiomyopathy phenotypes, arrhythmias, and coronary artery disease, and to create a better understanding of underlying pathophysiological processes.
Context : Ventricular tachycardia (VT) are serious heart rhythm disorders which can lead to sudden death. A curative treatment for these abnormalities in the cardiac electrical conduction system is possible through an interventional electrophysiology procedure. A catheter is inserted, generally via a femoral access, and is introduced in the heart ventricles in order to collect various 3D electro-anatomical maps. The pace-mapping technique developed in Nancy (de Chillou et al, Heart Rhythm 2014) allows the reentrant circuit underlying the VT to be identified, as well as a definition of the target zones to be ablated, using radiofrequency energy with the catheter. The pace-mapping technique consists of stimulating the ventricle from various sites within its internal surface, in order to generate different activation pathways of the myocardium. When an activation pathway is similar to the VT pathway, this means that the stimulation site is located near the pathologic zone to be ablated. The surface electrocardiogram (ECG) is used to compare activation pathways. A 3D correlation ma is then generated: the zones with high correlation (>90%) indicated the exit of the reentrant circuit, while rapid transition zones (several %/mm) indicate the entrance of the VT circuit. The pace-mapping technique has several limitations: (i) it requires an ECG recording of the clinical VT of the patient (spontaneous or induced at the beginning of the procedure), however it is not always possible to induce it; (ii) sometimes several VT circuits may be present, rendering the procedure of identification and ablation non-exhaustive. The aim of this study is to analyze retrospectively electroanatomical data collected during the intervention, in order to develop a new method for identifying target zones to be ablated, and to compare the results with the conventionally used method. Hypothesis : The investigators hypothesize that alternative methods to analyze electroanatomical data (surface ECG and spatial coordinates of the pacing sites) could provide information equivalent to conventional methods (e.g. VT correlation map, VT activation maps etc…) without the need for a reference recording of the clinical VT of the patient.
This study is being done to determine whether there is an increase in sympathetic nerve activity before the onset of ventricular arrhythmias or irregular heartbeat rhythm. In addition, this study is looking at the relationship between sympathetic nerve activity and how patients with ventricular arrhythmias respond to catheter ablation treatment.
Pacemapping is an essential tool during ablation of idiopathic PVC and VT. Automated template matching has been shown to have a significant influence on PVC ablation procedures, but the PASO module of CARTO3 has not been studied in a randomized trial. The Aim of this study is to evaluate the additional benefit of PASO template matching on PVC ablation procedure with regard to procedural parameters and outcome when compared with conventional pace mapping. A total of 144 pts will be randomised in a 1:1 fashion to PVC ablation guided by conventional pacemapping vs PVC ablation guided by PASO pacemapping. Patients will be follow up with Holter-ECG and TTE after 3 and 12 months.
Previous monocentric experiences have already highlighted the role of preoperative cardiac imaging, in particular of cardiac magnetic resonance (CMR) and tomography (CT), in improving the ablation results of scar-related ventricular tachycardia (VT). A better characterization of scar obtained with high quality CMR images and post processing data with creation of maps exploring the heart in concentric layers from the endocardium to the epicardium could allow a personalized and more precise approach to this pathology. Aim of the study - Evaluating the feasibility and possible benefit of CMR-guided ablative approach (group 1: ablation of the "anatomical" channels of heterogeneous tissue within the scar) compared to CMR-aided approach (group 2: ablation of the "electrical" conduction channels within the scar) and standard approach (group 3: ablation guided by an electro-anatomical system without the aid of CMR) in a multi-center Tuscan study. What would add the project to what we know - The achievement of the objectives by the project would allow to propose a personalized ablation on the basis of the scar characterization and would allow a better efficacy, efficiency of the procedure and probably also a safer treatment
The investigators hypothesize that preventive VT substrate ablation in patients with chronic ICM, previously selected based on imaging criteria (BZC mass) for their likely high arrhythmic risk, is safe and effective in preventing clinical VT events.
We aim to improve our understanding of a life-threatening heart rhythm disorder known as ventricular tachycardia (VT). This is a disorder which originates from the lower chamber of the heart and frequently is associated with heart disease. We will use an MRI scan to generate a computer based model of the heart which can predict areas of the heart which are important in generating this rhythm disorder. We intend to assess how accurate this computer model is compared to traditional invasive assessment of the heart muscle. We also aim to assess the electrical characteristics of those areas which were predicted by the computer model in order to see why they were thought to be so important. All patients seen at St George's Hospital with VT will be eligible. As is routine for these patients, they will have an MRI scan of the heart. We will then use this scan to create a virtual reconstruction of the heart from which predictions of the critical areas of the heart which are generating the rhythm problem will be made. Then we will perform a VT ablation (studying the electrical properties and if necessary making a burn to treat the rhythm problem) - as per standard of care, however during the ablation we will spend extra time collecting information comparing the accuracy of the computer-generated model to the traditional invasive signals which guide ablation. We will study the electrical properties of those predicted areas to see what is special about them. The study will last up to three years.
A multicentre trial on clinical effects of radiosurgical ablation of ventricular tachycardia (VT).