View clinical trials related to Tachycardia.
Filter by:Compression Garments are a commonly prescribed treatment in Postural Orthostatic Tachycardia Syndrome (POTS). The effectiveness of a proof-of-concept compression garment has been demonstrated in an acute laboratory setting. It is not known if commercially available compression garments that participants wear in their every day lives are effective at improving heart rate and reducing symptoms in POTS. This trial will evaluate the use of commercially available waist-high and abdominal compression garments in adults diagnosed with POTS in a community setting.
The LEADR study is designed to assess the safety and efficacy of the Next Generation ICD lead. The LEADR LBBAP study is being conducted under the existing US FDA Investigational Device Exemption (IDE) for the Next Generation ICD Lead and is designed to confirm the safety and defibrillation efficacy of the Next Generation ICD Lead when placed in the LBBAP location in ICD and LOT-CRT patient population.
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.
The infants diagnosed with SVT are treated with antiarrhythmic medication to prevent the recurrence of SVT. This prospective observational cohort study evaluates efficacy and safety of shortening duration of antiarrhythmic medication to four months in infants with SVT. Primary outcome is incidence of recurrent SVT in infants after 4 months of antiarrhythmic medication compared to retrospectively reviewed cohort.
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.
Several data emphasize the relation between tachycardia (>90/min) and high mortality during septic shock. The investigators previously demonstrated the high mortality associated with hypercontractility, tachycardia and the presence of a left ventricular obstruction. A severe hypovolemia, a hyper adrenergic stimulation or a severe vasoplegia can all explain this relation between tachycardia, hypercontractility and the mortality during septic shock. Landiolol is another short-term acting beta-blocker with a half-life of 4 minutes without any beta 2 activity or membrane stabilizing effect. The landiolol has been used in critically ill patients to control supraventricular tachycardia but not in this context of tachycardia and septic shock. The investigators hypothesize that landiolol by reducing the heart rate may improve the survival of patients treated for a septic shock and presenting with an hypercontractility state.
Observational study is to demonstrate a clinically significant reduction of ionizing radiation exposure during transcatheter ablation of supraventricular tachycardias using the EnSite precision mapping system in a real-world clinical setting without compromising efficacy and safety.
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.