Treatment Trials

317 Clinical Trials for Various Conditions

Focus your search

RECRUITING
Ablation-Index Guided Scar-Mediated Ventricular Tachycardia Ablation in Patients With Ischemic Cardiomyopathy
Description

Over the last decade, radiofrequency catheter ablation (RFCA) has become an established treatment for ventricular arrhythmias (VA). Due to the challenging nature of visualizing lesion formation in real time and ensuring an effective transmural lesion, different surrogate measures of lesion quality have been used. The Ablation Index (AI) is a variable incorporating power delivery in its formula and combining it with CF and time in a weighted equation which aims at allowing for a more precise estimation of lesion depth and quality when ablating VAs. AI guidance has previously been shown to improve outcomes in atrial and ventricular ablation in patients with premature ventricular complexes (PVC). However research on outcomes following AI-guidance for VT ablation specifically in patients with structural disease and prior myocardial infarction remains sparse. The investigators aim at conducting the first randomized controlled trial testing for the superiority of an AI-guided approach regarding procedural duration.

TERMINATED
Post-Acute Sequelae of Coronavirus-19 (COVID-19) With Dyspnea on Exertion And Associated TaChycardia TrEatment Study
Description

Most patients with acute COVID-19 (Coronavirus 19) recover within weeks, however a significant number of individuals will develop the post-acute COVID 19 syndrome (PASC). As of July 2021, the post COVID syndrome qualifies as a disability under the Americans with Disabilities Act. The symptoms which comprise this condition are highly variable and often extraordinarily debilitating. They may be distinct from the initial presentation or may mimic those which defined the initial infection. The post COVID syndrome can be diagnosed when symptoms persist longer than 3 months and may extend to beyond one year. There are risks for permanent levels of disability. Patients who seemingly did not have active COVID-19 symptoms in the days following infectious exposure may also develop post Covid syndromes. These syndromes are considered to constitute a distinct clinical entity which has of yet no clearly defined pathogenic mechanism or validated treatment algorithms. International investigative efforts are now underway to determine who might develop the post COVID syndrome, it's long term consequences and how best to treat its many problematic symptoms.

TERMINATED
The PSVT Place Registry.Paroxysmal Supraventricular Tachycardia (PSVT) Registry.
Description

Paroxysmal supraventricular tachycardia (PSVT) is a sporadic, sudden, and recurring tachycardia that is caused by an altered electrical conductivity in the heart. It causes palpitations and a rapid heart rate, which may induce fear in the patient and negatively impact the patient's quality of life. Therefore, most patients experience not only physical symptoms of PSVT, but also dramatic psychological burdens. As PSVT drug development efforts advance, it has become increasingly important to document the impact of PSVT in a systematic way, in terms of the disease natural history and clinical characteristics of PSVT episodes, as well as the psychological impact of the condition as reported by patients over time. In order to meet the needs for ongoing, systematic data collection on PSVT, a multinational registry, The PSVT Place Registry (www.PSVTPlaceRegistry.com), is being implemented and will be initially comprised of data entered directly by patients. The long-term registry is designed with a participant-focused approach to enable continuity of data collection and minimization of impact from changes of participants' health care providers. The registry may be expanded at a later time to include physician-reported data. The information from the registry is planned to be a resource for participants with PSVT, their families and support networks, their doctors, and the research community to better understand PSVT-related symptoms and awareness, PSVT diagnoses, patient self-management, medical treatments for PSVT, and impact of PSVT on quality of life from the patient perspective.

COMPLETED
Effect of Ivabradine on Patients With Postural Orthostatic Tachycardia Syndrome
Description

Postural orthostatic tachycardia syndrome (POTS) occurs in approximately 500,000 Americans, but predominates in women with a 5:1 ratio. Patients with POTS experience debilitating tachycardia upon postural changes such as standing that impairs their quality of life. Tachycardia is clinically defined as a heart rate greater than 100 beats/min; and in POTS patients, the prolonged heart rate increase is greater than 30 beats/min or increases to 120 beats/min within the first ten minutes of a diagnostic tilt table test without postural hypotension. There are currently no effective treatment methods for POTS. However, several studies suggest Ivabradine could be a main treatment option for POTS because Ivabradine specifically inhibits the f-channels (If) within the sinoatrial (SA) node, which slows the heart rate. Currently in the US, Ivabradine is mainly prescribed to treat chronic heart failure. It is well tolerated in patients, but it is not commonly prescribed for POTS. It has been also used for treatment of inappropriate sinus tachycardia with good benefit. The hypothesis for this experiment is that Ivabradine will reduce tachycardia and improve functional status in patients with POTS.

ENROLLING_BY_INVITATION
Autoimmune Basis for Postural Tachycardia Syndrome
Description

The purpose of this study is to see if some people with postural tachycardia syndrome (POTS) have higher levels of immune proteins (autoantibodies) directed against receptors of the autonomic nervous system, and if these autoantibodies make a difference in their POTS symptoms. The investigators also want to see if the levels of these autoantibodies stay the same over time.

TERMINATED
Impact of Tachycardia on Outcome After Subarachnoid Hemorrhage (SAH)
Description

The purpose of this retrospective study is to test the hypothesis that uncontrolled tachycardia serves as a risk factor for adverse cardiovascular events and poor outcome after Subarachnoid Hemorrhage (SAH).

COMPLETED
Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome
Description

Patients with Postural Tachycardia Syndrome (POTS) may not adequately expand their plasma volume in response to a high sodium diet. Mechanisms involved in the regulation of plasma volume, such as the renin-angiotensin-aldosterone system and renal dopamine (DA), may be impaired in POTS and may respond inappropriately to changes in dietary sodium. The investigators propose that the changes in urinary sodium and dopamine excretion caused by consuming low-sodium and high-sodium diets will be different between patients with POTS and healthy volunteers. The purpose of this study is to determine (1) whether changes in dietary sodium level appropriately influence sodium excretion in POTS; (2) whether changes in dietary sodium level appropriately influence DA excretion in POTS; (3) whether a high dietary sodium level appropriately expands plasma volume in POTS; and (4) whether patients with POTS have improvements in their orthostatic tachycardia and symptoms as a result of a high dietary sodium level.

COMPLETED
Intracardiac CrYoablation for AtrioVentricular Nodal Reentrant Tachycardia
Description

ICY-AVNRT (Intracardiac CrYoablation for AtrioVentricular Nodal Reentrant Tachycardia) is a prospective multi-center, nonrandomized, single arm, controlled, unblinded, investigational clinical study. The purpose of this clinical study is to demonstrate the safety and effectiveness of the Freezor® Xtra Cardiac CryoAblation Catheter for the cryoablation of the conducting tissues of the heart in the treatment of patients with atrioventricular nodal reentrant tachycardia (AVNRT) using an endocardial approach.

ACTIVE_NOT_RECRUITING
Intravenous (IV) Saline and Exercise in Postural Tachycardia Syndrome (POTS)
Description

The investigators will test whether an intravenous infusion of saline (salt water) will improve the exercise capacity in patients with postural tachycardia syndrome (POTS).

ACTIVE_NOT_RECRUITING
Breathing Device in Postural Orthostatic Tachycardia Syndrome (POTS)
Description

The investigators will test whether breathing through an inspiratory resistance device will improve the ability to be upright and decrease heart rate increases on standing in patients with postural tachycardia syndrome.

COMPLETED
Optimal Anti-tachycardia Therapy in Implantable Cardioverter-defibrillator (ICD) Patients Without Pacing Indications
Description

This study evaluates the impact of a new pacing mode avoiding unnecessary ventricular stimulation in combination with advanced dual chamber detection with slow VT management on the clinical outcome for hospitalization and mortality and inadequate therapy in medically stable, ICD-indicated patients with impaired left ventricular function (LVEF ≤ 40%) who do not have pacing indications and no indication for Cardiac Resynchronization Therapy (CRT). It compares a new pacing mode avoiding ventricular stimulation when not needed combined with dual chamber detection with a pure ventricular back up pacing and single chamber detection criteria with pure ventricular back up pacing. Therapies are compared in a prospective, randomized, single-blinded, parallel trial with a 24-month randomized treatment period. Randomization follows a 1:1 ratio. ICD therapy is enabled for all patients throughout the study. All patients receive optimal drug therapy for arrhythmia and heart failure treatment.

Conditions
ACTIVE_NOT_RECRUITING
PERceptions of Diltiazem Versus ADEnosine for Treatment of Supraventricular Tachycardia in the Emergency Department
Description

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).

ENROLLING_BY_INVITATION
Computational Cardiac Imaging Analysis to Guide Ventricular Tachycardia Ablation Procedures (AI-VT)
Description

The purpose of this study is to evaluate the clinical outcomes (clinical efficacy and safety) of using supplemental non-invasive computational ECG and cardiac imaging analysis tools to help guide ablation of ventricular tachycardia.

NOT_YET_RECRUITING
Ultrasound Guided Stellate Ganglion Block in Postural Tachycardia Syndrome
Description

This single-center study aims to evaluate both immediate and long-term outcomes of stellate ganglion block (SGB) in a cohort of rigorously phenotyped patients with Postural Tachycardia Syndrome (POTS). By assessing the effects of SGB, this study seeks to determine its viability as an intervention for symptom control in POTS.

NOT_YET_RECRUITING
VINTAGE (Ventricular Intramyocardial Navigation for Tachycardia Ablation Guided by Electrograms) Using Commercial Off-The-Shelf (COTS) Catheters
Description

Background: Ventricular arrhythmia is an abnormal pulse rhythm that starts in the lower part of the heart (ventricles). Treatment includes ablation; ablation uses heat to destroy small portions of the heart that are causing short circuits in the normal heartbeats. But ablation does not always work well because some parts of the heart are hard to reach with current tools. Researchers want to try a new method called VINTAGE (ventricular intramyocardial navigation for tachycardia ablation guided by electrograms). VINTAGE may be better able to treat portions of the heart that are harder to reach with standard techniques. Objective: To test VINTAGE in people with ventricular arrhythmia. Eligibility: People aged 21 years and older with ventricular arrhythmia that did not respond to standard treatment. Design: Participants will have baseline tests. They will have blood tests and tests of their heart function. They will have imaging scans. They will complete a health questionnaire. Participants will undergo the VINTAGE procedure. They will be either completely or partially asleep. Doctors will insert tubes through large blood vessels in the groin. Tubes may also be inserted through the chest and wrist. They will use x-rays and ultrasound to guide tubes and guidewires directly into the heart muscle to do the ablation. Participants will stay in the hospital 1 or more nights after the procedure. Participants will have 3 follow-up visits over 6 months. These visits are for standard care after heart ablation. They will include blood tests, imaging scans, and tests of heart function. Participants may also wear a device to monitor their heart rhythms at home.

RECRUITING
Pulsed Field Ablation for Post-Infarction Ventricular Tachycardia
Description

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 FlexAbility SE or ThermoCool ST catheter for ablation 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.

RECRUITING
Treatment of Focal Ventricular Tachycardias Using a Pulsed Field Ablation From a Point Ablation Catheter Short Title FOCUS-PFA
Description

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.

RECRUITING
Trial in Arrhythmia Radioablation for Ventricular Tachycardia: Single Fraction vs Three Fractions
Description

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.

RECRUITING
Safety and Performance Assessment of the Sphere-9™ Catheter and Affera™ Ablation System for the Treatment of Ventricular Tachycardia
Description

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.

RECRUITING
Defining the Risk of Ventricular Tachycardia in Genetic Forms of Early-onset Atrial Fibrillation
Description

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.

RECRUITING
Study of Natriuretic Peptide Receptor 1 (NPR1) Antagonist in Adult Patients With Postural Orthostatic Tachycardia Syndrome (POTS)
Description

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)

RECRUITING
Defining the Risk of Ventricular Tachycardia in Genetic Cardiomyopathies
Description

The goal of this observational study is to determine if electrophysiologic mapping and cardiac MRI can help identify patients that have genetic forms of cardiomyopathy that are at high risk for development of dangerous ventricular arrhythmias. The investigators aim to study: 1. the prevalence and mechanism of inducible ventricular tachycardia 2. pace-mapping to define the site of origin of ventricular arrhythmias 3. voltage mapping to define low voltage scar substrate in the basal LV to determine the risk of development of ventricular arrhythmias in patients with genetic forms of cardiomyopathy. Participants will undergo cardiac MRI before their scheduled procedure and voltage mapping during their scheduled procedure as part of data collection.

RECRUITING
MANAGE-VT Registry - MANAGEment of Ventricular Tachycardia Outcomes Registry
Description

Data collection registry for patients with ventricular tachycardia to help physicians give better care for patients clinically and procedurally.

RECRUITING
Phenotyping of Postural Orthostatic Tachycardia Syndrome (POTS)
Description

This is an observational study to deeply phenotype the disorder of POTS using multiple testing modalities.

COMPLETED
Non-invasive Vagal Neurostimulation (nVNS) in Adolescents With Postural Orthostatic Tachycardia Syndrome (POTS)
Description

The purpose of this study is to determine if nVNS will decrease autonomic symptom intensity (COMPASS-31 and Child Functional Disability Inventory) in adolescent patients with postural orthostatic tachycardia syndrome (POTS) in comparison to standard recovery STEPS management.

NOT_YET_RECRUITING
Ablation-Index Guided Ventricular Tachycardia Ablations
Description

Over the last decade, radiofrequency catheter ablation (RFCA) has become an established treatment for ventricular arrhythmias (VA). Due to the challenging nature of visualizing lesion formation in real time and ensuring an effective transmural lesion, different surrogate measures of lesion quality have been used. The Ablation Index (AI) is a variable incorporating power delivery in its formula and combining it with CF and time in a weighted equation which aims at allowing for a more precise estimation of lesion depth and quality when ablating VAs. AI guidance has previously been shown to improve outcomes in atrial and ventricular ablation in patients with premature ventricular complexes (PVC). However research on outcomes following AI-guidance for VT ablation specifically in patients with structural disease and prior myocardial infarction remains sparse. We aim at conducting a prospective observational multicenter registry investigating the efficacy and safety of AI-guided VA ablation in patient with ischemic and non-ischemic cardiomyopathy.

TERMINATED
Effectiveness of CRD-4730 in Participants With Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT)
Description

This is a Phase 2, multicenter, double-blind, sponsor unblinded, placebo-controlled, single-dose clinical study of CRD-4730 to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of CRD-4730 when administered as single oral doses to participants with Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT). The study will have 2 cohorts in which participants with CPVT will participate in a 3-period, randomized 2-sequence study. Each participant will receive 2 different doses of CRD-4730 and 1 dose of matching placebo, with each study drug administered as a single dose.

RECRUITING
Chemoreflex and Baroreflex Alterations Causing Postural Tachycardia Syndrome With Orthostatic Hyperpnea and Hypocapnia
Description

Postural tachycardia syndrome (POTS) is the most common chronic cause of postural lightheadedness, and upright confusion afflicting many Americans, mostly young women. Many POTS patients hyperventilate by increasing their depth of breathing that produces tachycardia, alters blood flow and blood pooling in the body and importantly reduces brain blood flow causing "brain fog". In this proposal the investigators will demonstrate in young women that abnormal repeated brief impairment of blood pressure and brain flow just after standing sensitizes the body's oxygen sensor in POTS to respond as if it were in a low oxygen environment causing hyperventilation and its consequences. In this project the investigators will use various drugs that will help to understand the mechanisms that cause POTS in this unique subset of POTS patients who hyperventilate.

RECRUITING
Abbott Ventricular Tachycardia PAS
Description

This post-approval study (PAS) is designed to provide continued clinical evidence to confirm the long-term safety and effectiveness of the FlexAbilityTM Ablation Catheter, Sensor EnabledTM (FlexAbility SE) for the treatment of ventricular tachycardia in a post-market environment. This is a prospective, single arm, open-label, multi-center, observational study.

RECRUITING
Cardiac RADIoablation Versus Repeat Catheter Ablation: a Pivotal Randomized Clinical Trial Evaluating Safety and Efficacy for Patients With High-risk Refractory Ventricular Tachycardia (RADIATE-VT)
Description

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.