Active clinical trials for "Atrial Fibrillation"

The purpose of this study is to prospectively follow the next 200 patients who undergo catheter ablation of atrial fibrillation for symptoms and signs of esophageal injury.

Previous studies of hyperthyroid patients suggest that they remain at increased risk of cardiovascular morbidity after restoring euthyroidism. The study objective is to compare the rate and causes of hospitalization of hyperthyroid patients treated with radioactive iodine (RAI) with those of an age- and gender-matched reference population in a long-term follow-up study.

Cardiovascular disease (CVD) is one of the leading causes of death in the United States. Currently, there is little information about the lifetime risk of CVD among non-white ethnic groups. This study will analyze data from participants in several ongoing clinical studies to identify the lifetime risk for CVD among various ethnicities.

Atrial fibrillation (AFib) represents the most frequent cardiac arrhythmia whose prevalence appears to be increasing in the general population. Furthermore, this arrhythmia determines an increased risk of neurological complications (stroke) and, consequently, of mortality and morbidity. Currently, the first choice for the treatment of AFib is represented by the use of antiarrhythmic drugs. In patients who do not respond to pharmacological treatment, the ESC 2016 European guidelines recommend the execution of transcatheter ablation (Class I, level of evidence A). However, minimally invasive pulmonary vein isolation surgery (PVI) is recommended for subjects who are not even responsive to transcatheter ablation (Class IIa, Level of Evidence B). Previous studies have demonstrated good short-term results of thoracoscopic AFib ablation using PVI, with a 1-year freedom from atrial fibrillation recurrence without antiarrhythmic drugs of approximately 64-73%. However, only a few authors have described the medium-long term follow-up outcomes. The aim of this study is to report the long-term follow-up data of ablation of isolated, predominantly paroxysmal atrial fibrillation performed by isolation of the pulmonary veins by radiofrequency in bilateral thoracoscopy.

The overall objective of this analysis is to understand patient characteristics, the use of treatment, and clinical outcomes among obese (overweight) and severely obese patients with non-valvular atrial fibrillation (NVAF) who initiate therapy with OACs (oral anti-coagulants). The aim of this study is to compare all DOACs (direct oral anti-coagulants) to warfarin. However, the primary analysis will be conducted among apixaban vs warfarin patients only. If sample size permits, we will also conduct other DOAC vs warfarin and DOAC vs DOAC analysis.

Atrial fibrillation (AF) is the most common cardiac arrhythmia associated with excessive risk of ischemic stroke and heart failure as well as reduced life expectancy. On the other hand, chronic coronary syndromes (CCS) remains the main cause of morbidity and mortality in an aging population. Both disease entities share common risk factors such as hypertension, diabetes and obesity The purpose of the study is to investigate the hypothesis indicating lack of significant coronary lesions in AF vs. sinus rhythm (SR) patients.

This study will characterize patients with ischemic stroke, a condition which occurs when a vessel supplying blood to the brain is obstructed, and a subpopulation of patients with irregular and often rapid heart rate (atrial fibrillation) in a UK general population using The Health Improvement Network (THIN) database. The main aim of the study is to estimate in how many patients atrial fibrillation was diagnosed at the moment of stroke and to describe whether these patients received OAC at the time of the stroke. In addition, researchers want to learn about the relative risk of ischemic stroke when such patients did not continue OAC treatment.

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.

A single center prospective case-control study to evaluate ability of a wearable to differentiate between atrial fibrillation (AF) and sinus rhythm (SR).

Atrial fibrillation (AF) is the most common cardiac arrhythmia in adults. It is a major cause of ischemic stroke and heart failure. Intravascular cardiac ablation of the left atrium by catheter delivery is an efficient treatment to restore sinus rhythm. AF ablation is a class IIa treatment for patients with symptomatic persistent AF refractory or intolerant to antiarrhythmic medication. There are still many debates considering the ablation strategy. The pulmonary veins remain the cornerstone of AF ablation therapy, even in persistent AF. There is a large electrical remodeling occurring in the left atrium between paroxysmal AF, early persistent AF and long-standing persistent AF. However, no multicentric and randomized study has demonstrated so far the interest of targeting other left atrial substrate, such as rotors or focal sources. Our study aims to describe with a noninvasive mapping system the arrhythmogenic substrate of persistent AF > 6 months pre- and post-cardioversion, and after pulmonary vein isolation.