Active clinical trials for "Atrial Fibrillation"

The purpose of this study is to compare single groin puncture and bilateral groin puncture during AF ablation procedure. The investigators will compare 1) the degree of patients' discomfort during hemostasis by questionaire, 2) procedure time, 3) complication rates, and 4) 1-year clinical recurrence rate of AF.

Aim of the present prospective, single-centre study is to determine the outcome after pure PVI using HeartLight™ in 100 patients with different extents of LA-LVA. The latter will be assessed by an electro-anatomical voltage map using a commercial 3D mapping system (CARTO, Biosense Webster).

The ALICIA-FA study will elucidate whether targeting atrial myocardial fibrosis identified by late gadolinium-enhanced magnetic resonance imaging (LGE-MRI) improves atrial fibrillation (AF) ablation outcomes.

The optimal strategy for catheter ablation of persistent atrial fibrillation is not clearly defined. This study investigates if Complex Fractionated Atrial Electrogram (CFAE) ablation in addition to pulmonary vein isolation and linear ablations improves single procedural success rate over a 12 month follow up period.

The primary objective of this study is to assess combined end point (All stroke, Systemic embolism, Cardiovascular death) between two groups.

A study for subjects with atrial fibrillation (AF) or atrial flutter who are diagnosed with left atrial (LA) or left atrial appendage (LAA) thrombus. The study will assign subjects to rivaroxaban for treatment of thrombi. The study will measure thrombus outcomes based on echo image and common clinical outcomes such as bleeding and stroke or thromboembolism.

Atrial fibrillation (AF) is the commonest condition affecting the rhythm of the heart and causes an irregular and often rapid heartbeat. Developing this condition may cause significant health problems and symptoms that affect normal day-to-day activities. Patients with AF also have a shorter life expectancy on average. Tablets used to try to normalise the heart rhythm rarely work well. As a result, doctors have devised a treatment to try to cure this condition. Special wires (called catheters) are used to deliver heat energy (called ablation) on the inside surface of the heart. This technique has been used more and more in recent years for patients with troublesome symptoms due to AF. The aim of the treatment is to draw lines of ablation in specific places in the heart. Unfortunately, a lot of patients (almost 50%) get AF again after this treatment and most of these patients have a second treatment performed. It is usually found at this second treatment that gaps have developed in the lines of ablation that were drawn the first time around. The investigators think that electively doing a second treatment to close these gaps a couple of months after the first treatment may mean that fewer of these patients will get AF again in the future. The investigators also want to find out what factors make a line of ablation less likely to develop gaps. In this study, participants will be assigned to one of two groups: a "standard care" group, who will have a single treatment initially. a "repeat study" group, who will have the initial treatment followed by a second treatment 8-10 weeks later. For patients in the "repeat study group", investigators will see how many have developed gaps since their first treatment. The investigators will look at where these gaps are and will compare this with information collected during the first treatment to try to work out why the gap has developed. Any gaps found at the second treatment will be closed again. All participants will then be monitored carefully over 12 months to see how many from each group get AF again. To do this, all participants will be given a handheld heart rhythm monitor to keep until the end of the study. This device is simple to use. Participants will be asked to make a 30 second recording of their heart rhythm each day and also whenever they have symptoms. These recordings will be downloaded at review appointments arranged 6 weeks, 3 months, 6 months and 12 months after the initial ablation procedure.

The GOLD FORCE trial investigates the differences between treatment with a Contact Force single-tip catheter against the PVAC GOLD multielectrode catheter in cardiac ablation procedures in patients with paroxysmal atrial fibrillation.

We randomly assigned 390 patients with symptomatic, paroxysmal AF to undergo catheter ablation with PVI (PVI group) alone or combined with 6 additional ablation lines extended outside the PVI circumferences at 1, 3 and 6 o'clock of left PV and 6, 9 and 11 o'clock of right PV (PVI+6L group). Patients received monthly 12-lead electrocardiogram, 24-hour Holter at 3, 6 and 9 months and 14-days continuous monitoring at 12 months to detect atrial tachyarrhythmia. The follow-up period was 12 months. The primary end point was freedom from AF recurrence between 91 and 365 days after catheter ablation. The secondary end points included the AF burden, procedural parameters, and complications.

The investigators prospectively investigate the differences between contact-force guided pulmonary vein isolation (PVI) and conventional pulmonary vein isolation in patients with paroxysmal atrial fibrillation (PAF) with respect to adenosine guided unmasking of dormant conduction, procedural and clinical outcome.