View clinical trials related to Arrhythmias, Cardiac.
Filter by:This study will verify the 1-channel patch-type ECG's arrhythmia diagnostic concordance rate and electrocardiogram measurement performance by collecting ECG signals from patch-type ECG and Holter device simultaneously for data analysis.
Background: Bruton s tyrosine kinase inhibitors (BTKi) are used to treat a form of leukemia. But taking BTKi can also increase a person s risk of developing an abnormal heart rhythm. This can cause sudden death. In this natural history study, researchers want to learn how BTKi affects the heart. Objective: To identify and monitor the effects of BTKi on the heart. Eligibility: People aged 18 and older currently receiving or planning to receive BTKi or venetoclax. Design: Participants who have not yet started BTKi will have 2 required clinic visits: 1 before they start taking BTKi, and 1 about 6 months later. Participants who are already taking BTKi will have 1 required visit. Participants will undergo multiple tests: A physical exam, including collection of blood and saliva. A test that measures heart activity via stickers placed on the chest. A test that uses sound waves to capture images of the heart. An exercise stress test that monitors heart activity and blood pressure while the participant works on a treadmill or stationary bike. Sound wave images of the heart may also be taken while the participant exercises. Stress magnetic resonance imaging (MRI) may be done in place of an exercise test. Participants will lie on a table that slides into a tube. They will be given drugs to stress the heart while images are taken. Participants may wear a device to monitor their heart at home. Participants may have repeat visits if they develop heart symptoms or if they need to stop taking BTKi. They will have follow-up phone calls each year for up to 3 years.
Treatment of ventricular arrhythmias (VA) originating at the base of the heart may be challenging. Unipolar radio-frequency (RF) ablation is a standard approach to treat VA, however, it fails in 10 to 75% of patients, depending on the localization of VA. The main reason for unipolar ablation failure is the intramural location of the source of VA. In such patients, bipolar ablation may occur effective. However, there are no prospective studies or registries on consecutive patients wilt failed unipolar ablation, therefore, the proportion of candidates for bipolar ablation after failed unipolar approach is not known. Also, invasive electrophysiological parameters associated with successful unipolar and bipolar ablation have not been well established. It has been hypothesised that (1) bipolar ablation fails in 12-75% (mean 30%) of consecutive patients and these patients are candidates for bipolar ablation, (2) local ventricular signal precocity > 20 ms, unipolar signal without R wave and pace mapping 12/12 predict effective unipolar ablation but not bipolar ablation, (3) morphology of VA from surface ECG can identify patients with possible intramural localization, and (4) successful ablation results in improvement of quality of life (QoL). Aims: 1. To assess how many patients after failed unipolar ablation need redo procedure with bipolar ablation (primary end-point) 2. To assess which intraprocedural electrophysiological parameters predict success during standard unipolar ablation (secondary endpoint) 3. To assess short term efficacy of bipolar ablation (secondary endpoint) 4. To assess one-month efficacy of bipolar ablation (secondary endpoint) 5. To assess which intraprocedural electrophysiological parameters predict success during redo bipolar ablation (secondary endpoint) 6. To evaluate the performance of ECG-based algorithms in predicting the localization / origin of VA, especially of transmural origin (secondary endpoint) 7. To assess the effects of ablation on QoL (secondary endpoint)Methods. The study group consists of all consecutive patients who underwent unipolar ablation of VA originating from the base of the heart in the Grochowski Hospital and collaborating centres. All these patients are referred to Grochowski Hospital for further follow-up and treatment if needed, including bipolar ablation if initial unipolar approach failed. In all patients acute and one-month efficacy of unipolar and bipolar ablation is assessed.
The Impulse Dynamics Optimizer Device is a Food and Drug Administration (FDA) approved; commercially available device indicated for patients with heart failure with reduced ejection fraction (HFrEF). Many candidates of this device have a previously implanted cardiovascular implantable electronic device (CIED)- internal cardioverter defibrillator (ICD) or permanent pacemaker (PM). Patients with heart failure are at high risk for both atrial and ventricular cardiac arrhythmias. The aim of this study is to evaluate patients for Atrial fibrillation (AF) burden episode data obtained from interrogation of their CIED 8 months or greater after Optimizer implant and compare arrhythmia burden 6 months before Optimizer Cardiac Contractility Modulation (CCM) device insertion to 8 months or greater after Optimizer insertion (after 2 month blanking period).
The primary objective of the study is to assess the chronic safety of MicroPort CRM market-released systems.
Background: Exposure to high altitudes has been associated with an increased risk of cardiac arrhythmias in healthy subjects and an increased risk of sudden cardiac death. Aim: The aim of the present study is to evaluate the risk and the incidence of cardiac arrhythmias at extreme altitude. Methods: This is a prospective cohort study of healthy volunteers determined to climb Mount Everest. Subjects will be evaluated for eligibility by electrocardiography and echocardiography. All study participants will undergo ambulatory rhythm monitoring in their home environment within 12 weeks of the climb. Subsequently, ambulatory rhythm monitoring will be repeated during the ascent from basecamp to the summit of Mount Everest. The primary endpoint will be the composite of supraventricular and ventricular tachyarrhythmias, and bradyarrhythmias.
The study is to evaluate the performance of the PulseAI neural network technology at interpreting ECG data recorded using a single-lead Smartwatch (Apple Watch).
The goal of the this observational study is to gather clinically available data on patients presenting with a suspicion for arrhythmia-induced cardiomyopathy (AiCM) at the University Hospital Basel.
In this study, the investigators evaluated the association between various measures of adiposity [BMI and waist circumference (WC)] and clinical outcomes in Asian patients who underwent pacemaker insertion, using a nationwide population based cohort.
In this study, the investigators evaluated the association between various measures of adiposity [BMI and waist circumference (WC)] and clinical outcomes in Asian patients who underwent Implantable Cardioverter-defibrillator (ICD) insertion, using a nationwide population based cohort.