Active clinical trials for "Atrial Fibrillation"

The Biorhythm study aims to investigate the utility of new biomarkers (e.g. MR proANP, ST2) measured pre-procedure for the prediction of procedural success in patients with atrial fibrillation undergoing cardioversion or ablation.

This quality improvement intervention seeks to implement two Best Practice Alerts (BPAs) for use in cardiology clinics while simultaneously evaluating the impact of each BPA- one for patients with uncontrolled blood pressure and one for patients with atrial fibrillation not on anticoagulation.

This study is multicentric, single-blind, and interventional with a randomization into two parallel arm, between a standard of care information and an additional information of the patient, with a 12 month follow up. The aim of this study is to evaluate the effectiveness of a personalized information program versus information provided from standard of care in patients taking Xarelto for Stroke Prevention in Atrial Fibrillation.

This study will evaluate the efficacy of the Foresight Intracardiac Echocardiography system ,with improved image quality, in guiding trans-septal punctures during atrial fibrillation ablation procedures.

The study evaluates the use of half-normal saline as an irrigant for open-irrigated catheters during atrial fibrillation ablation. By increasing the efficacy of radiofrequency energy-mediated lesion formation, half-normal saline has the potential to reduce procedural times and improved acute and long-term outcomes.

Atrial fibrillation (AF) is the most common sustained arrhythmia in the United States and it has been associated with ethanol use. Understanding how ethanol affects the electrical properties of the heart and induces AF has important public health implications. The objective of this research is to investigate the mechanistic relationship between ethanol and atrial fibrillation in humans by performing a placebo controlled study looking at the electrical properties of the heart in patients receiving intravenous ethanol or placebo. The investigators hypothesize that ethanol increases the susceptibility of human myocardium to atrial fibrillation through electrophysiologic changes in the atrial myocardium in the acute setting.

12 patients with Atrial Fibrillation, a kind of irregular heart beat who have undergone Radio frequency (RF) ablation will be asked to swallow the capsule. As they swallow the capsule, images of the esophagus will be taken to see if the RF ablation caused any form of damage to the esophagus considering it being so close to the heart. After the capsule has been removed from the mouth, they will be asked about the tolerability of the capsule.

The purpose of this study is to test the efficacy of visualization and relaxation exercises together with a structured behavioural attention from nurses during ablation of atrial fibrillation. The study will test the following hypothesis which is also aim for intervention: Relaxation and visualization performed in patients during ablation of atrial fibrillation combined with structured attention behaviour from the nurse reduces the patient's experience of pain and anxiety - and secondary reduces the consumption of painkillers and the number of episodes of adverse outcome that requires extra attention from staff. The survey is conducted as a controlled trial with a control group and an intervention group.

Rationale: The narrow therapeutic range and wide inter-patient variability in dose requirement make anticoagulation response to coumarin derivatives unpredictable. As a result, patients require frequent monitoring to avert adverse effects and maintain therapeutic efficacy. Polymorphisms in cytochrome P450 2C9 (CYP2C9) and vitamin K epoxide reductase complex 1 (VKORC1) jointly account for about 40% of the inter-individual variability in dose requirements. To date, several pharmacogenetic guided dosing algorithms for coumarin derivatives, predominately for warfarin, have been developed. However, the potential benefit of these dosing algorithms in terms of their safety and clinical utility has not been adequately investigated in randomised settings. Objective: To determine whether a dosing algorithm containing genetic information increases the time within therapeutic INR range during anticoagulation therapy with each of warfarin, acenocoumarol and phenprocoumon compared to a dosing regimen that does not contain this information. Secondary outcomes of the study include cost effectiveness, number of thromboembolic and bleeding events, time to reach stable dose and number of supratherapeutic INR peaks. Study design: This is a two-armed, single-blinded, randomised controlled trial. In one arm (intervention) patients commencing anticoagulation therapy with either warfarin, acenocoumarol or phenprocoumon will be dosed according to a drug-specific genotype-guided dosing algorithm, which is based on genetic information, clinical data and (in the monitoring phase) previous INR. For the other arm (control) patients will be dosed according to a non-genotype-guided dosing regimen which does not include genetic information. The follow-up period per patient is 3 months. Study population: Newly diagnosed patients of both genders and at least 18 years old who need anticoagulant treatment with either acenocoumarol, phenprocoumon or warfarin within the low intensity INR range will be included in the trial. Main study parameters/endpoints: The % time within therapeutic INR range in the first 3 months of anticoagulation therapy. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Six extra blood samples are taken from each participant at the start of the study. Patients also have to attend 8 scheduled visits within the 3 months study period and are asked to fill in questionnaires. The genotype-guided dosing algorithm is anticipated to improve the accuracy of coumarin dosing and thus improve the safety and efficacy of anticoagulation therapy.

This is a pilot study to test the effects of the SMART-3RP (Stress Management and Resiliency Training Relaxation Response Resiliency Program) on quality of life, mental health, arrhythmia burden, and heart rate variability (HRV) in patients with paroxysmal atrial fibrillation (PAF).