View clinical trials related to Arrhythmia.
Filter by:The purpose of this study is to determine, among a large cohort of 300 consecutive patients with hypertrophic cardiomyopathy, if extended ambulatory monitoring using the iRhythm Technologies, Inc. Zio XT device results in identifying a greater burden of nonsustained ventricular tachyarrhythmia (nsVT) compared to current ACCF/AHA guideline recommended 48-hour monitoring.
Obesity, rheumatoid arthritis (RA) and gene-specific dilated cardiomyopathy (DCM) are common medical conditions. Small-scale studies have shown that these are associated with proarrhythmic changes on 12-lead electrocardiogram (ECG) and a higher risk of sudden cardiac death (SCD). However, these studies lack the deep electrophysiological phenotyping required to explain their observations. Electrocardiographic imaging (ECGi) is a non-invasive alternative to 12-lead ECG, by which epicardial potentials, electrograms and activation sequences can be recorded to study adverse electrophysiological modelling in greater depth and on a more focussed, subject-specific scale. Therefore, this study proposes to better define the risk of arrhythmia and understand the underlying adverse electrophysiological remodelling conferring this risk in three groups (obesity, RA and DCM). Firstly, data from two large, national repositories will be analysed to identify associations between routine clinical biomarkers and proarrhythmic 12-lead ECG parameters, to confirm adverse electrophysiological remodelling and a higher risk of arrhythmia. Secondly,ECGi will be performed before and after planned clinical intervention in obese and RA patients, and at baseline in titin-truncating variant (TTNtv)-positive and -negative DCM patients, to characterise the specific and potentially reversible conduction and repolarisation abnormalities that may underlie increased arrhythmic risk.
This study aims to investigate the efficacy and safety of oral sotalol alone or combination with other anti-arrhythmic medicines in the treatment of arrhythmias in children. The study will regularly monitor the Holter, electrocardiogram (ECG), Echocardiography (Echo), blood routine, urine routine, serum ion, liver and kidney function, troponin I, hypersensitive troponin T, N-terminal pro-brain natriuretic peptide (NT pro-BNP), etc, before and after receive sotalol therapy. Compare the degree of arrhythmia improvement in patients and the side effects after oral sotalol.
This study is a prevelance trial looking at how sleep apnoea affects the heart especially heart rhythms. Previous research shows that patients suffering from sleep apnoea are much more likely to get heart disease and abnormal heart rhythms (arrhythmias). These defects are sometimes missed by the traditional methods of monitoring i.e. 24-hour Holter monitor and ECGs. This means potentially dangerous arrhythmias may not be detected. Additionally, standard therapy for sleep apnoea does not significantly reduce the risk of heart disease. This study will recruit 200 participants over a period of 18 months. The research team will observe the heart rhythms of sleep apnoea patients by inserting an implantable loop recorder (ILR) in up to 100 participants. The other 100 patients will simply have standard care. This device will monitor the heart continuously for 3 years allowing us to detect abnormal heart rhythms and treat as necessary. Demonstrating the incidence of arrhythmia can lead onto a larger study which may change future sleep apnoea management improving their cardiovascular outcomes. Other markers of heart disease such as; blood tests, Magnetocardiography and Echocardiography will be performed on participants to shed more light on the mechanisms which link sleep apnoea and heart disease/arrhythmia.
Autonomic nervous system dysfunction is known to be associated with an increased risk of heart rhythm abnormalities and sudden cardiac death (SCD) in patients with chronic heart failure - a condition affecting millions of people worldwide. The nitric oxide pathway has been identified as being involved in mediating the effects of the autonomic nervous system on the heart. Recent studies have shown that dietary nitrates can increase the availability of nitric oxide in the body. This study hopes to find out if dietary nitrate supplementation can help to improve cardiac and autonomic function in patients with heart failure and autonomic dysfunction and reduce the risk of arrhythmias.
The primary objectives for the registry is to evaluate the overall incidence of serious complications or adverse events for primary implants and replacement devices, and assess the cost and time efficiency for both physicians and patients. The Registry is a multi ASC data collection registry. Data collection will occur at the time of screening, implant, and 2 weeks after implant at the time of wound check.
Novel technology enables it to monitor noninvasively the vital signs of a patient. Such a monitoring is immediately required to improve patient safety and to reduce hospital readmissions. In this study, novel bed- and wearable sensors are studied for this purpose.
A Retrospective Propensity Matched Study comparing: - real zero fluoroscopy catheter ablation - conventional fluoroscopy catheter ablation without 3D system - conventional fluoroscopy catheter ablation with 3D system
To observe the safety and effectiveness of ImageReady™ MR conditional defibrillation system in a Chinese population.
To date, no studies have evaluated the safety or efficiency (improvement of maximal oxygen uptake [VO2peak]) of a high-intensity interval training (HIIT) program in post-acute coronary syndrome (post-ACS) patients. Heart rate variability (HRV) and recovery (HRR), QT dispersion (QTd) and ventricular arrhythmias are all indices associated with an increased risk of cardiac death. HIIT has been shown to improve these risk markers and be safe in coronary heart disease patients but not yet in post-ACS patients which are considered more at risks. The aim of this study was to compare a HIIT program to a moderate-intensity continuous exercise training (MICET) program on HRV, HRR, QTd parameters and occurrence of ventricular arrhythmias in post-ACS patients.