Active clinical trials for "Atrial Fibrillation"

Prevention of stroke in patients with atrial fibrillation (AF). Hypothesis: In patients with non-valvular AF, orally administered betrixaban will provide similar or better efficacy and safety than warfarin and it will offer the advantage of not requiring dose adjustments due to international normalized ratios (INRs) outside the target range of 2.0 to 3.0 and a more consistent level of anticoagulation over time.

This is a prospective, non-randomized, multicenter, multi-country pilot study to evaluate the safety and effectiveness of the Ablation Frontiers Cardiac Ablation System for the ablative treatment of symptomatic permanent atrial fibrillation.

Assess the tolerability and safety of a rapid bolus of tecadenoson at different dose levels when given alone and in combination with a beta-blocker (esmolol) in patients with atrial fibrillation to control rapid heart rate. Explore the pharmacokinetic and pharmacodynamic effects when given alone and in combination with beta-blocker (esmolol).

The purpose of this study is to demonstrate the safety and effectiveness of the THERMOCOOL® SMARTTOUCH™ Catheters with Contact Force Sensing Capability in the treatment of drug refractory symptomatic paroxysmal Atrial Fibrillation (AF) during standard electrophysiology mapping and RF procedures.

This is a sequential phase 1 and phase 2 study to evaluate the efficacy of intracardiac echocardiography to detect septal and left atrial pathology as compared to transesophageal echocardiography (Phase 1) and its value in a management strategy for immediate cardioversion during cardiac catheterization procedures in patients with atrial fibrillation as compared to a conventional strategy delaying cardioversion till full anticoagulation is established for a three weeks (Phase 2). Phase 1 will enroll 100 patients at 12 centers; these patients will be undergoing clinically indicated TEE & cardiac catheterization procedures. After review of Phase 1 results by an independent DSMB & the investigators that establish efficacy of ICE, Phase 2 will be initiated. Phase 2 will enroll 300 patients in 15 centers; these patients with atrial fibrillation will be undergoing clinically indicated cardiac catheterization procedures and have a clinical indication for cardioversion. Patients will be randomized to ICE guided cardioversion strategy or a conventional strategy employing three weeks of full anticoagulation before cardioversion. ICE imaging will be used to identify a low risk group for immediate cardioversion. A composite primary study endpoint that will include mortality and major morbidity including stroke and bleeding complications will be used. This study will examines two hypotheses in AF patients undergoing invasive cardiac procedures: Hypothesis 1: That ICE has comparable efficacy to TEE in visualization of left atrial pathology or septal defects that can predispose patients to stroke. This will be evaluated during the Phase I component of the study. Hypothesis 2: That ICE can identify low risk patients in whom immediate cardioversion during the procedure is safe and comparably effective to electrical cardioversion performed based on a conventional strategy of a minimum of 3 weeks of preceding anticoagulation therapy. Low risk patients are expected to have an acceptably low incidence rate of stroke, transient ischemic attack (TIA), peripheral embolism, and major hemorrhagic events following electrical cardioversion. This will be evaluated during the Phase II component of the study, after the Phase I objective is achieved.

To evaluate the safety, efficacy, and tolerability of 3 doses of K201 (oral) administered for up to 28 days in subjects with recent DC cardioversion to sinus rhythm from sustained symptomatic atrial fibrillation (AF duration >3 days and <6 months).

Atrial Fibrillation is a heart condition in which people are treated with blood thinners such as warfarin to decrease the risk of stroke. Large studies have shown that when patients adjust their own dose of warfarin, similar to insulin, results are better. The purpose of this study is to evaluate whether implementing this method of warfarin management is beneficial in a Canadian primary care clinic. Patients will be educated on how to adjust their own warfarin doses when necessary using simple charts. The success of patient self management will be compared against management by a physician.

The purpose of this study is to determine the safety and effectiveness of the endoscopic ablation system - adaptive contact (EAS-AC) in treated paroxysmal atrial fibrillation (PAF) with pulmonary vein isolation (PVI).

This is a demonstration of safety and efficacy of the ablation for pulmonary vein isolation in the treatment of paroxysmal atrial fibrillation.

The purpose of this study is to compare manual and magnetic navigation in ablation for atrial fibrillation.