View clinical trials related to Persistent Atrial Fibrillation.
Filter by:This study is aimed to compare the efficacy of bi-atrial ablation with left atrial ablation for atrial fibrillation during mitral valve surgery in patients with rheumatic mitral valve disease.
The STOP Persistent AF Post Approval Study (PAS) is a prospective, global, multicenter, observational trial.
This clinical investigation evaluates the feasibility of the Rodeo Micro Mapping Catheter in combination with cryoablation ssystem (sclerotherapy of muscle tissue of the heart by freezing) in patients with atrial fibrillation (permanent atrial fibrillation excepted). Further aims of this study are the evaluation of safety of the device and average procedure and fluoroscopy times.
The protocol aims to evaluate the efficacy of the radial ablation technique of the maintenance mechanisms in persistent atrial fibrillation compared to the isolation of the pulmonary veins evaluating the atrial fibrillation burden during one year follow-up.
Catheter ablation has emerged as an important treatment option for patients with symptomatic atrial fibrillation (AF). Pulmonary vein antral isolation (PVI) is now considered the cornerstone technique of AF ablation and has shown promise in treating paroxysmal atrial fibrillation (PAF). However, there is no unique strategy for ablation of persistent AF (PeAF), whether PVI alone is sufficient to prevent patients from recurrence remains controversial. The PROMPT-AF study is a prospective, multicenter, randomized trial involving a blinded assessment of outcomes, which is designed to compare arrhythmia-free survival between PVI and an ablation strategy termed upgraded '2C3L' for ablation of PeAF.
The purpose for this study is to determine whether left posterior wall isolation (PWI) in addition to pulmonary vein isolation (PVI) is effective as ablation strategy for persistent atrial fibrillation (AF).
Under current practice, patients with persistent atrial fibrillation, can be offered one of two types of ablation treatment. Both of these treatments are aimed at electrically isolating the 4 pulmonary veins (PVs) at the back of the heart which connect it to the lungs. These PVs have been identified to serve as the sites where the abnormal heart rhythm is generated. One of the treatments is called radiofrequency (RF) catheter ablation, where 'heat energy' is delivered through the tip of a catheter to make tiny burns (ablation lesions) around the outlines of the 4 PVs at their bases. The other treatment technique utilises a 'cold balloon' (Cryoenergy or cryoballoon ablation) to freeze the bases of the 4 PVs to achieve the electrical isolation. Sometimes the treated tissues develop reconnections that can lead to a recurrence of the abnormal heart rhythm, and thus the need for a repeat procedure. In this study, participants will receive a second treatment 2 months after the first one. During the second treatment, investigators will check to identify areas that have developed reconnections since the first treatment; these will be treated again. This will increase the chances of all participants having a complete treatment. In order to improve understanding of how best to treat this condition, investigators will also carry out some further measurements within the heart during the repeat procedure. During these measurements, investigators will check to see if treatment has succeeded in reducing the occurrence of an abnormal heart rhythm. In the group of participants in whom RF energy is used for the initial procedure, investigators will also treat the back wall of the heart, and repeat these measurements.
The primary purpose of this registry is to obtain real-world clinical experience of Paroxysmal (PAF) and Persistent (PsAF) Atrial Fibrillation ablation radiofrequency (RF) technologies. Data from the registry will be used to assess clinical outcomes, including procedural efficiency, safety, and long-term, effectiveness of catheter ablation with novel RF technologies in PAF and PsAF patients.
This is a prospective, single-center, study. A targeted number of 181patients with persistent AF will be included according to pre-defined criteria. The ablation procedure consists on the identification of the arrhythmic substrate using a novel integrated mapping technique. We hypothesize that such approach may potentially lead to a mechanisms-targeted ablation strategy of persistent AF.
Atrial fibrillation (AF) is the most common type of chronic heart rhythm disease worldwide, with significant associated co-morbidities. Although there have been advances in understanding the mechanisms of AF, the underlying cause of AF and factors which perpetuate it remain incompletely understood. This is particularly the case for persistent AF (persAF). Drug treatments for persAF have a role but can have undesirable side effects with relatively limited efficacy. Furthermore, current invasive therapies for persAF remain suboptimal, requiring significant resources, and with potentially serious complications for patients. Catheter ablation is an effective treatment for paroxysmal AF. For persistent AF (persAF), however, catheter ablation does not provide similar results. This is because there remains a poor understanding of the electrophysiological mechanisms driving persAF. Part of this study aims to further explore the specific locations that represent important substrates which would guide more effective catheter ablation. There have been several different ablation approaches explored in the past (see below), however, these did not improve the outcome post procedure compared with pulmonary vein isolation alone. A pilot study has already been carried out and I aim to expand this further with a larger cohort of patients (10-20) over 2 years. In this study the investigators want to explore whether stable high dominant frequency (HDF) sites (with a high organisation index) act as potential drivers of Atrial Fibrillation. Thus, targeting these sites may results in prolongation of the cycle length and thus possible termination of the arrhythmia.