Active clinical trials for "Atrial Fibrillation"

Canadian WATCHMAN Registry is a multicentre (8 Centres) Canadian prospective, non-randomized, registry to enrol 100 consecutive patients undergoing LAA closure with the WATCHAN device to study the safety and effectiveness of the WATCHMAN device

This prospective, single-centre cohort study aims to investigate the association between known genetic Atrial Fibrillation (AF) risk variants and the amount of left atrial fibrosis found in patients undergoing clinically indicated AF catheter ablation procedures. Left atrial fibrosis is increasingly recognized as a fundamental part of the pathomorphological substrate creating an electrophysiological environment needed for electrical conduction heterogeneities. Such identification and treatment of left atrial fibrosis has already entered routine clinical use for RF catheter ablation in an attempt to develop an individualized and tailored treatment strategy. Today, it is unclear what impacts the development, the extent and the localization of left atrial fibrosis in different patients. A number of genetic risk variants have been described that confer risk of AF and have been widely replicated. This indicates that genetic variants contribute to the risk of the individual to develop AF throughout his life. However, the mechanisms of how genetic variant impact the development of clinical arrhythmias is not yet well understood. We hypothesize that genetic influences that lead to tissue changes may play a role in the development of the arrhythmia substrate for AF. This is likely to be especially true for those with a relatively brief history of AF and modest clinical disease burden. Therefore, we plan to investigate the association between known genetic AF variants and a detailed disease phenotype obtained from individual left atrial voltage mapping.

Prospective, multi-center, investigator-driven trial. This study hypothesizes that combining surgical endoscopic and transcatheter techniques in a staged fashion provides superior clinical outcomes than isolated surgical/EP approaches in patients with persistent AF lasting > 1 year but > 5 years. The proposed procedure involves the creation of cardiac lesions with epicardially applied radiofrequency (RF) ablation through a minimally invasive surgical (MIS) approach followed by a delayed EP ablation procedure performed at 1-2 months from the surgical operation.

The purpose of this study is to determine whether lipid levels are related with incidence of atrial fibrillation in Patients with chronic heart failure.

Exosome plays an important role in the pathophysiology of the cardiovascular system. Since the field of cardiovascular exosome is still in its infancy, there are no available data regarding to its role in cardiac arrhythmias. The current study investigates the role of epicardial fat derived exosomes in patients who suffer from atrial fibrillation.

The aim of this study to investigate the correlation between preoperative LA function using 2D echocardiography and left atrium 2D speckle tracking strain echocardiography and the development of Post Operative AF after CABG. the investigators chose electrocardiography as a reference standard for detection of Post Operative AF. LA dysfunction is diagnosed with Echocardiography

To investigate whether fibroblast growth factor 23 can be used to predict recurrence after catheter ablation for atrial fibrillation and to provide an objective basis for the clinical selection of the optimal patients for catheter ablation.

The purpose of this study is to conduct a continuous telephone follow-up study on subjects who had completed the one-year follow-up of the LAmbre™ left atrial appendage (LAA) system registration trial. The follow-up time was 2 years, 3 years, 4 years and 5 years after left atrial appendage closure operation, to evaluate the long-term safety and effectiveness of LAmbre™ LAA Closure System.

The study will try to access the efficacy of atrial pacing, medication and radiofrequency ablation in treating patients with paroxysmal atrial fibrillation and sinus node dysfunction; to identify the response to these treatments in patients with "functional" and organic sinus node dysfunction respectively; to explore the necessity of pacemaker implantation in patients with "functional" sinus node dysfunction. Patients who meet the inclusion criteria will receive pacemaker implantation followed by trial pacing, medication and radiofrequency ablation of AF. Device data will be analyzed to answer the question. And after follow-up of 1 year, lower rate of pacemaker will be set as 40 bpm for patients without AF. The proportion of pacing and patients' tolerance will be analyzed.

A. Compare the plasmatic biomarkers between the cohort with and without AFib. B. Find sensitive and specific biomarkers that could be used for the diagnostic management of AFib. C. Compare the quality of sleep between the cohort with and without AFib by the means of sleeping quality questionnaire