View clinical trials related to Tachycardia, Ventricular.
Filter by:Substrate-based DEEP mapping and activation mapping are the two main techniques used for ventricular tachycardia (VT) ablation. There is no sufficiently reliable data in the medical scientific literature comparing the extent of applicability, the results of the procedure strategy, and the long-term outcomes between the two mapping strategies. This randomized clinical trial aims to test whether activation mapping is superior to DEEP mapping to reduce ventricular tachycardia recurrence. The primary outcome of the study is to compare the efficacy as a recurrence-free survival rate of ventricular tachycardia, at 6 and 12 months, of substrate-based DEEP mapping versus activation mapping in guiding catheter ablation to prevent VT recurrence.
The goal of this randomized clinical trial is to test the efficacy of stereotactic body radiation therapy (SBRT) in treating ventricular tachycardia (VT) in patients with advanced structural heart disease. The main questions it aims to answer are: - What is the efficacy of SBRT compared to catheter ablation (CA) in achieving a ≥ 75% reduction in VT burden at 6 months - What is the comparable safety profile of SBRT vs CA Researchers will compare SBRT and CA (standard of care).
The goal of this clinical trial is to make clear that a new method, right ventricular outflow tract (RVOT) posterior septum pacing, has a greater accuracy in predicting the origin of ventricular outflow tract (VOT) ventricular arrhythmias (VAs) compared to the previous electrocardiographic standards for the identification of the origin of ventricular outflow tract. The secondary aim is to investigate, by using the new method, if it can optimize the procedure of radiofrequency catheter ablation. Researches will break the method of this investigation into two steps: First step have enrolled 100 patients. This step would be used to compare the results predicted by right ventricular outflow tract posterior septum pacing, with the previously used electrocardiographic criteria and actual target site. The second step will enroll another 100 patients. In this step, patients will be divided into two groups, one being the new protocol group and the other being the convention group. Patients will also be followed up, for 1 month and 3 months at outpatient clinic post procedure. Procedure time, success rate, fluoroscopy exposure time and complications, are compared between RVOT posterior septum pacing group and convention group.
This is an exploratory research aiming to accurately identify the site of origin of tachyarrhythmia using Magnetocardiography (MCG), which will have guiding significance for early diagnosis, the formulation of treatment plans and preoperative positioning for radiofrequency ablation.
The goal of this observational study is to evaluate the clinical characteristics of patients undergoing permanent cardiac pacing and to compare procedural efficacy and safety of different implantation approaches in the clinical practice of the participating centres. The contribution of non-fluoroscopic anatomical and electrophysiological reconstruction systems to device implantation procedures will also be evaluated. Participants [patients over 18 years old with an indication to receive a definitive pacemaker/intracardiac defibrillator implant] will receive a permanent cardiac pacing implant as requested according to European Society of Cardiology (ESC) guidelines; the investigators will evaluate procedural efficacy and safety of different implantation approaches.
This is a multicenter, interventional study. The study will enroll patients that fulfill the inclusion criteria over a 33-month period. Considering the small number of patients who will meet the study criteria, it is also possible to include retrospective patients who already underwent STAR (for instance, as part of a compassionate program) if they meet all the inclusion and exclusion criteria as well as the treatment planning standardized requirements and sign their consent to this trial. All patients prospectively enrolled will undergo a flow of investigations following a standardized approach. ICD programming will be standardized.
Evidence for the usefulness of the defibrillator in cases of preserved left ventricular ejection fraction and well-tolerated ventricular tachycardia (without cardiocirculatory arrest or syncope) is lacking, as no previous trials have included such patients. Additionally, sudden death in this particular population is low compared to other subgroups of patients with malignant ventricular arrhythmias. On the other hand, numerous recent retrospective data show that ablation of ventricular tachycardia can reduce mortality, and also clearly reduces the number of recurrences in prospective studies. Finally, a very low rate of sudden death was observed in a multicenter European retrospective study that we conducted, including patients with well-tolerated ventricular tachycardia in structural heart disease with minimally impaired ejection fraction and benefiting from ablation without implantation of defibrillator.
The objective of this study is to determine if there is a meaningful benefit to using the sedative medication dexmedetomidine in the acute treatment of patients with recurrent ventricular arrhythmias, known as electrical storm. This will be a multi-centre, double-blinded, placebo-controlled, randomized trial. Patients with electrical storm will be randomized to receive 48 to 72 hours of dexmedetomidine or placebo as part of their initial treatment in an intensive care unit.
Implantable cardioverter-defibrillators (ICD) are currently recommended for the primary prevention of sudden cardiac death (SCD) in patients with a remote (>6 weeks) myocardial infarction (MI) and a low (≤35%) left ventricular ejection fraction (LVEF). Ventricular tachycardia (VT) and/or ventricular fibrillation (VF), which are responsible for most SCDs, result from the presence of surviving myocytes embedded within fibrotic MI-scar. The presence of these surviving myocytes, as well as their specific arrhythmic characteristics, is not captured by LVEF. Hence, the use of LVEF as a unique risk-stratifier of SCD results in a low proportion (17 to 31%) of appropriate ICD device therapy at 2 years. Consequently, most patients with a prophylactic ICD do not present VT/VF requiring ICD therapy prior to their first-ICD battery depletion. Thus, many patients are exposed to ICD complications, such as inappropriate shocks, without deriving any health benefit. Therefore, the current implantation strategy of prophylactic ICDs, based on LVEF only, needs to be improved in post-MI patients.
This is a prospective safety and feasibility study to evaluate the safety of the FieldForce™ Ablation system in patients with ventricular arrhythmia divided into two groups: VT (VCAS-I) and frequent premature ventricular complex (VCAS-II).