View clinical trials related to Atrial Fibrillation.
Filter by:Rapid heart rhythms originating from the upper heart chambers (atrial tachyarrhythmias) are very common after open-heart surgery. The hypothesis of the PAPABEAR study is that a brief (13 day) peri-operative course of oral amiodarone therapy would be effective and safe for the prevention of these post-operative atrial tachyarrhythmias.
Patients complaining of tachycardia but with a negative Holter ECG, are for a limited time period offered a simplified electrophysiological(EP) examination. By a full electrophysiological study(EP study)electrodes are introduced for pacing and sensing i all four heart chambers. Where as by the mini invasive EP study only one electrode is introduced to the right atrium. The simplified procedure represent a smaller risk of complications, requires less resources but should yield the same diagnoses in more than 90% of the cases. The study is a feasibility study to see if the procedure can discover arrythmias in a fairly unselected patient population.
The purpose of this study is to determine if the combination of clopidogrel 75mg once daily (od) plus aspirin 100mg daily (recommended dose) is better than aspirin alone (100mg daily recommended dose) for preventing vascular events such as stroke and heart attack during approximately three years of follow-up in patients with atrial fibrillation associated with at least one major risk factor of vascular event such as elderly, blood pressure increase, history of stroke or transient ischemic attack or left ventricular dysfunction etc. The study will also accept patients with atrial fibrillation and unwilling to take oral anticoagulant therapy.
The purpose of this study was to determine if Irbesartan compared to Placebo would reduce the risk of vascular events such as heart attack, stroke, non-cerebral thromboembolic event and death in patients with Atrial Fibrillation (AF) and with at least one major risk of vascular events.
The investigators' goal with this research is to: 1. Establish a clinical database and a DNA bank for 1000 individuals with AF and 1000 individuals without AF. 2. Directly test the hypothesis that known functional polymorphisms in the coding sequences and the promoter regions of cardiac genes (ion channels and genes known to affect survival in the setting of left ventricular dysfunction) predispose individuals to AF. Over the past decade, advancing techniques and technologies for gene characterization have yielded significant clues as to the molecular mechanism of certain human heart rhythm disorders. The role of ion channel polymorphisms in subjects with AF is unknown. Similarly, it is also not known whether polymorphisms in other genes have an impact on the risk of AF. The ability to characterize genomic "at-risk" profiles would have many potential benefits for patient care. Paramount among these is: 1. Increased oversight or intervention of at-risk subjects, which might prevent unnecessary morbidity and mortality due to AF. 2. Further insight into the pathogenesis of AF, which may lead to preventative or curative therapies.
Atrial fibrillation (AF) is the most common cardiac arrhythmia. Pulmonary vein isolation (PVI) in the left atrium using radiofrequency energy is a new and promising non-medical treatment in patients with symptomatic AF with reported success rates of 65 % to 90 % depending on AF classification and ablation procedure. However, the risk of recurrence has led to suggestions of how to improve the clinical outcome by tailoring a more efficient ablation procedure. A prospective, randomised study with 150 patients with symptomatic AF referred for PVI has been initiated and patients are allocated to PVI alone (75 patients) or PVI with additional ablation in the right atrium (75 patients). Patients undergo extensive monitoring of the heart rhythm during follow-up to document symptomatic or asymptomatic AF or atrial flutter. The presence of asymptomatic AF after PVI could potentially affect the management of the anticoagulation therapy in these patients. The structural and functional changes in the atria after PVI is characterized by new imaging techniques (Tissue Doppler Imaging(TDI))of the atria and cardiac neurohormones. TDI may be an effective tool for characterising changes in the left atrial function after PVI. Neurohormones may provide new information regarding the changes in left atrial function and clinical outcome after PVI in patients with AF. We hypothesize that: - Among patients with predominant atrial fibrillation, PVI with additional ablation in the right atrium is associated with better outcome, i.e. freedom of symptomatic AF/atrial flutter overall. - Asymptomatic AF and atrial flutter occur frequently after PVI. - Left atrial volume and systolic function correlates to AF recurrence after PVI. - Neurohormones levels correlates to AF recurrence after PVI.
The purpose of this study is to monitor heart rate regularization in patients with permanent atrial fibrillation and standard indication for single chamber rate adaptive pacing VVI(R).
Odiparcil is being studied to determine if it can prevent blood clots from forming after a total knee replacement and also to prove that odiparcil is safe.
Evaluate efficacy and safety of Indobufen v. Aspirin in preventing thromboembolic events in patients at high risk of CV events such as patients suffering from nonrheumatic atrial fibrillation.
This study will allow determination of the pharmacokinetic and pharmacodynamics of SB424323 in a relevant population. The data from this study will be used along with other data to aid in choosing the most appropriate dose for the later phase study.