Active clinical trials for "Atrial Fibrillation"

The main objective of the present project is to develop an imaging-based tool to determine the origin and cause of persistent atrial fibrillation (AF). The result of the study is a diagnostic method which aids the medical work-up of patients suffering from this disease.

Background : Despite recent progress in the management of patients with Atrial Fibrillation (AF), AF remains one of the main risk factor of stroke, heart failure and cardiovascular mortality in the world. AF is the most common cardiac arrhythmia, and its prevalence is expected to grow in the coming years. Catheter ablation (CA) of AF can be successful in restoring and maintaining Sinus rhythm (SR) in patients with paroxysmal, and persistent AF. Haissaguerre et al. have shown that AF ablation of the heart by isolating the Pulmonary Vein is usually sufficient. However, when ablating persistent AF patients ablating pathological regions in the atria is also required. CA is still a challenging procedure, and reported success rate for persistent AF patients remains relatively low (around 60%). This procedure is associated with risks inherent to any invasive cardiac procedures. A better identification of good responders would reduce the risks associated with ablation, especially for patients with low odds of favorable outcome, while also increasing the success rate of the procedure. It has been shown in the literature the long-term CA outcome can be predicted non-invasively by atrial fibrillatory wave (f-wave) amplitudes. Hypothesis : We assume that a morphological analysis of the f-waves on standard twelve ECG will allow for a better CA outcome prediction. Objectives : The aim of this study is to automatically analyse the morphology of the ECG signal before a CA procedure, extract relevant features for an accurate prediction of long-term CA outcome for patients in persistent AF.

AF and cancer frequently coexist. Since these patients are usually excluded from randomized trials, information on their management and outcome is scarce. Occurrence of relevant clinical events, such as ischemic and hemorrhagic and all-cause mortality and cardiovascular (CV) mortality occurring in patients treated or not with antithrombotic agents needs to be clarified. A prospective observational registry collecting information, in a real world setting, on the clinical profile of patients with these clinical conditions and on the use of antithrombotic drugs in patients with AF and cancer could improve our knowledge on the management of these high risk patients.

The purpose of this research is to simplify the standard recording system of the heart rhythm. The investigators desire to improve the ease of monitoring the cardiac rhythm for 24 hours. The investigators intent is to use a very small, innovative monitoring patch system that relieves the patient of wearing a cumbersome and uncomfortable recording system. This research trial will carry the title "The Simple ECG Monitoring" for Comparison of a Sternal ECG Recording System with a Standard ECG Recording System for Holter Monitoring. The data from the investigational device is for comparative purposes only. It will not be used by medical personnel for study subject treatment or diagnostic purposes.

The purpose of the study is to gather electrophysiological data using a multi-electrode mapping catheter during a clinically indicated cardiac ablation procedure for the treatment of persistent atrial fibrillation.

Since decades, oral anticoagulation (OAC) with vitamin K antagonists (VKA) is an established therapy for both prevention and treatment of thromboembolism in daily clinical routine. Increasing life-expectancy, the demographic change and novel oral anticoagulants lead to an increasing complexity of medical therapy. However, data on quality and management of VKA therapy with phenprocoumon in current medical care are limited. Our aim was to investigate the quality of OAC with VKA in current health care and to evaluate the potential for improvements. The investigator-initiated thrombEVAL study program comprises two cohorts of patients treated with vitamin K antagonists for oral anticoagulation therapy in real-life settings: a multicentre cohort of patients in regular medical care and a multi-local, single centre cohort of patients in a telemedicine-based coagulation service. The study program is expected to enrol a total number of approximately 2,000 to 2,500 patients. Both cohorts build on a detailed clinical assessment of participants and anticoagulation therapy at study enrolment. Subsequently active and passive follow-up investigations are carried out to document and validate complications of the treatment. Primary short-term outcome is the distribution of time in therapeutic range; the primary long-term outcome comprises the composite of stroke, systemic embolism, myocardial infarction, major and clinically-relevant bleeding and death.

This study will be divided into two phases. The purpose of the Phase I registry is to assess the current force being used for ablation of symptomatic paroxysmal AF in a wide range of operators in different Canadian centres with the operators being blinded to the contact force data. In Phase II of the study, operators will have open use of the force contact data. Phase I and II data will be compared in order to assess the efficiency of using the THERMOCOOL® SMARTTOUCH™ catheter.

The objective of this study is to assess the atrial fibrillation (AF) episode detection when using the SJM(St. Jude Medical) Confirm ICM (Implantable Cardiac Monitor).

The aim of this study is to evaluate the feasibility of patient education on feeling the own pulse irregularity in the elderly population of Lieto. Prevalence of atrial fibrillation (AF) rises with age. Subjects have often symptoms like palpitation and discomfort but especially in elderly population there's significant quantity of persons who don't feel any symptoms and fail to seek for medical care for stroke prevention. The main objectives in this study are to find out the prevalence of AF in the elderly population of Lieto, to assess the feasibility and reability of patient education on feeling one's pulse irregularity and the affect to the quality of life of the participating subjects and monitoring the possible increased burden to the public health care system. The study contains two office visits with specified learning session and long-term phone-call follow-up.

Purpose To validate 2 -day loop recording ( R.Test Evolution 4 ) to 2 -day Holter recording (gold standard) for the detection of atrial fibrillation of ≥ 30 seconds duration in a consecutive population of patients with stroke or transient ischemic attack (TIA). To determine whether short run of atrial fibrillation (< 30s ) or the presence of many supraventricular extrasystoles detected on Holter recording, is associated with risk of re-stroke in a consecutive population of patients with stroke or TIA . To test whether a 7-day Loop Recording (R -test) detects more patients with atrial fibrillation than 2 days of Holter recording in a consecutive population of patients with stroke or TIA.