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ASCEND is a randomized controlled open-label pilot study evaluating the safety and effectiveness of pulsed field ablation (PFA) with the novel FARAPOINT catheter compared to the standard radiofrequency (RFA) ablation with ThermoCool ST/FlexAbility SE/ThermoCool ST SF/TactiFlex SE of ventricular tachycardia (VT) in the patients with ischemic cardiomyopathy and implantable cardioverter-defibrillator (ICD). The study hypothesis is that the PFA ablation is more efficient compared to the RFA technique but retains a comparable safety profile.
Sphere-9 VT is a prospective, multi-center, non-randomized, unblinded feasibility study. Adult subjects with recurrent, sustained, monomorphic ventricular tachycardia due to prior myocardial infarction will be enrolled and treated with the Sphere-9 Catheter and Affera Ablation System.
RADIATE-VT is a pivotal, multicenter, randomized trial comparing safety and efficacy between cardiac radioablation (CRA) using the Varian CRA System and repeat catheter ablation (CA), for patients with high-risk refractory ventricular tachycardia (VT) who have experienced VT recurrence after CA and are candidates for additional CA.
Comparative effectiveness randomized clinical trial, comparing endocardial radiofrequency ablation alone vs radiofrequency ablation combined with venous ethanol in patients with ischemic ventricular tachycardia -Venous Ethanol for Left Ventricular Ischemic Ventricular Tachycardia -VELVET clinical trial
Congenital heart disease (CHD) affects approximately 1% of newborns in the US, with 25% of those affected having critical conditions requiring open heart surgery within one year of birth. Surgical and medical advances have allowed many patients to live beyond their fourth and fifth decades of life. Unfortunately, cardiac arrhythmias are a relatively common sequela due to cardiac anomalies and surgical scars in addition to residual volume and pressure load on the heart. Atrial arrhythmias, including sinus node dysfunction and intra-atrial re-entrant tachycardia (IART) are among the more common abnormalities found in adults with repaired CHD. The presence of IART significantly increases morbidity and mortality, and anti-arrhythmic medications have been shown to be a sub-optimal treatment strategy with the majority of patients requiring multi-drug therapy. Catheter ablation procedures remain a treatment option, but are less successful for some patient demographics. In the mid-1990's, pacemakers with atrial anti-tachycardia pacing (ATP) capabilities were developed, primarily for the management of atrial flutter and fibrillation in adults with structurally normal hearts. Given the need for pacemakers in the CHD population to manage sinus node dysfunction and atrioventricular node conduction block, the adoption of atrial anti-tachycardia pacemakers began to gain favor. However, there is limited data available comparing the safety and effectiveness of ATP therapy between various demographics of CHD patients. In the current study, the investigators aim to determine if ATP is an effective treatment strategy for IART, specifically within particular sub-populations of CHD patients. Additionally, investigators hope to delineate any significant differences in efficacy of ATP treatment between adult and pediatric congenital heart patients. The research team will accomplish our goals with a retrospective, multi-center study in which data is collected from existing electronic medical records and pacemaker interrogations. Following data collection, the investigators will employ statistical analyses to determine if certain CHD demographics are statistically significant predictors of ATP therapy outcomes. The purpose of this prospective/retrospective study is to determine how effective atrial anti-tachycardia therapies are with the congenital heart patients who are known to have atrial arrhythmias. As this population ages, we know that arrhythmic burden increases and medications are increased or changed for symptomatic improvement. Patients will be enrolled at the time of anti tachycardia device (ATD) placement or when device therapies are turned on. Patients will need a minimum of 5 years of clinical history prior to implantation and after implantation (unless patient is very young). Data will be collected both retrospectively and prospectively. The research team will consent patients at the time of clinical evaluations and scheduled follow-ups (usually 3 - 6 months). If therapy is effective, investigators will determine the specific programming which was successful. If therapy was ineffective, investigators will also determine if a change in programing was made and if this improved ATP efficacy. Investigators will also determine the arrhythmia burden. Cardioversion and medications before and after ATD implantation will be the key determinants of arrhythmia burden in this study.
Supraventricular tachycardia (SVT) is a dysrhythmia characterized rapid heart rate, typically with rapid onset. SVT accounts for over 50,000 emergency department visits per year. Of patients with regular, narrow-complex SVT, the mainstay of therapy includes adenosine and diltiazem. Adenosine is recommend by American and European guidelines as first-line therapy, however adenosine carries unique side effects that are potentially distressing to patients, including: "feeling of impending death or doom", flushing, anxiety, shortness of breath, and chest discomfort. Diltiazem does not carry this side effect profile, but has typically been reserved as second-line treatment due to side effects of low blood pressure associated with this class of medications. Diltiazem and adenosine have not been well studied head-to-head to compare safety and efficacy of their treatment for SVT. The purpose of this study is to evaluate safety and efficacy of adenosine and diltiazem for SVT in the ED (as completed through chart review of specific patient-level outcomes) and capture patient and clinician perspectives of medication satisfaction (through administration of questionnaires).
The purpose of this study is to examine the use of a point ablation catheter (Farapoint, Boston Scientific) in the mapping and ablation of focal ventricular arrhythmias (premature ventricular contractions or ventricular tachycardia) using pulsed field energy.
This is a research study that aims to understand if giving a lower dose of treatment all at once is as effective and safe as dividing it into three smaller doses for patients with a heart condition called refractory ventricular tachycardia (VT). These patients have not exhibited positive responses to conventional medications or procedures. This study aims to explore whether an alternative approach could yield more beneficial outcomes.
To use programmed ventricular stimulation at the time of AF ablation to define the prevalence and mechanism of inducible ventricular tachycardia (VT); pace-mapping to define the site of origin of ventricular arrhythmias; and voltage mapping to define low voltage scar substrate in the basal LV in patients with pathogenic TTN variants compared to genotype-negative controls.
This study is researching an experimental drug called REGN7544 (called "study drug"). The study is focused on participants with POTS. The aim of the study is to see how safe, tolerable, and effective the study drug is. The study is looking at several other research questions, including: * How the study drug changes heart rate and blood pressure in participants with POTS * What side effects may happen from taking the study drug * How much study drug is in the blood at different times * Whether the body makes antibodies against the study drug (which could make the study drug less effective or could lead to side effects)