View clinical trials related to Arrhythmia.
Filter by:The association between exposure to ambient air pollution and pulmonary disease has been well established.To date no study has assessed the burden of cardiovascular disease in Israel and its relation to ambient air pollution. The Haifa Bay Area has a long history of industrialization including possessing the nation's largest oil refineries, oil-fired power plant, agrochemical and cement producers, industrial incinerators and the Eastern Mediterranean's busiest port. The presence of industrial and mobile sources, combined with a basin effect has contributed to air pollution in the Haifa Bay Area and has raised concerns about potential health effects. Research Objectives - Determine if the increased rate of cardiovascular mortality in Haifa is associated with PM 2.5 concentrations. - Assess effect modification in diverse sub-populations. - If an association does exist, assess the economic burden of PM 2.5 associated cardiovascular morbidity and mortality. - Design prediction models of daily cardiovascular emergency department visits based on daily and seasonal variation of air pollution.
The purpose of this study is to assess efficacy of prolonged Full Disclosure electrocardiogram (ECG) monitoring and signal analysis using advanced telemetric technology to diagnose arrhythmia in comparison with standard diagnostic procedure.
The purpose of this study is to assess efficacy of prolonged Full Disclosure electrocardiogram (ECG) monitoring and signal analysis using advanced telemetric technology in comparison with a standard Holter ECG recording and an Event Holter recording to diagnose cardiac arrhythmia.
Some patients are at risk for life-threatening fast heart rates. These can frequently be treated by using a catheter inside the heart to burn away the cells that create the fast heart rates. The purpose of this study is to image the nerves inside the heart of those patients. The investigators want to find out if abnormalities in the nervous system in the heart can help the physician to find the area that needs to be burnt away.
The prospective EUTrigTreat multi-center study is an observational, advanced diagnostics and genetic risk stratification trial in patients with standard indications for ICD treatment, with and without myocardial infarction in their history. Its aims are fourfold: 1) To accurately risk stratify a large cohort of implantable cardioverter-defibrillator (ICD) patients for ICD shock risk and mortality using traditional risk markers as well as genetic markers 2) To find a link between repolarization biomarkers and genetic markers of calcium metabolism. 3) To compare invasive and noninvasive electrophysiologic (EP) testing systematically 4) To assess temporal changes of typical noninvasive risk stratifiers and their prognostic implication. In five European academic clinical centers, 700 ICD patients are prospectively enrolled (optionally the number of enrolled patients may be expanded to 1000 patients). Comprehensive non-invasive risk stratifying ECG diagnostics including beat-to-beat variability of repolarization (BVR) are applied, and candidate genes associated with malignant arrhythmias are analyzed. Programmed electrical stimulation is performed to test for inducibility of malignant ventricular arrhythmias and BVR. In a subset of patients, electrophysiologic studies include recording of monophasic action potentials (MAP) from the right ventricle for assessment of restitution properties. Non-invasive risk stratifying ECG methods are repeated annually. Outcome (mortality, ICD shocks) will be assessed until September 2014.
The goal of this register is the documentation of the success as well as of the complications regarding interventional therapy of cardiac arrhythmia by catheter ablation. This is the necessary basis for quality management and development of possible improvements of catheter ablation.
Polymorphic ventricular tachycardia, known as Torsades de Pointes (TdP), is a specific form of ventricular arrhythmia with a characteristic twist of the QRS complex around the isoelectric baseline. TdP can degenerate into ventricular defibrillation followed by sudden cardiac death. A predictor for the development of TdP is the length of the QT interval measured on an EKG recording. The QT interval is known to be prolonged by many medications used in a perioperative setting as well as by other conditions such as hypothermia and electrolyte imbalance. General anesthesia exposes most of the investigators patients to a combination of several of those medications and conditions and therefore might increase the risk for the development of QT prolongation. Moreover, patient related risk factors are well known and aggravate the individual risk for potential life threatening TdP events when exposed to QT prolonging medications perioperatively. Previous research suggests that more than 20% of the patients might develop QT prolongations perioperatively and are consequently on an increased risk for TdP; yet, no study has systematically investigated the magnitude of the problem and associated risk factors. The proposed pilot study is designed as a prospective observational cohort study to investigate the QT interval before, during and after general anesthesia. It aims to determine the incidence of perioperative QT prolongations. A customary long term EKG recording device will be connected to a random sample of patients undergoing general anesthesia. Using these continuous EKG tracings, the lengths of the QT interval will be analyzed during the perioperative period.
To compare heart function, symptoms, exercise capacity and quality of life in patients with Congestive Heart Failure (CHF) and Atrial Fibrillation (AF)before and after catheter ablation. Hypothesis: Restoration and maintenance of sinus rhythm by catheter ablation, without the use of antiarrhythmic drugs, in AF and CHF improves heart failure status.
The primary purpose of this study is to assess the long term reliability of the Medtronic Adapta®/Sensia™/Versa™ platform of devices. This study is required by FDA as a condition of approval of nEw3 devices. Patients will be followed for 5 years after implant. This study utilizes data collected from the System Longevity Study (SLS).
The Medtronic CapSure Epi Lead Post-approval Study will assess long-term safety of the 4968 lead. This study is part of the Medtronic System Longevity Study.