Active clinical trials for "Atrial Fibrillation"

Kidney function in patients with atrial fibrillation (AF) is tending to decline over a time which is clearly demonstrated in clinical studies. Renal impairment is a risk factor for stroke, its progression is associated with unfavorable prognosis. So preserving kidney function should be considered as a one of priorities when choosing treatment strategies which is especially important in patients with existing chronic kidney disease (CKD) or in patients who have risk of its development. This is especially relevant for the patients with type 2 diabetes mellitus (T2DM) and with CKD who can be considered as a group of risk for rapid kidney function decline.

All patients with atrial fibrillation who are treated with vitamin-k antagonists (warfarin, phenprocoumon) or non vitamin K oral anticoagulants (Dabigatran, Rivaroxaban, Apixaban, Edoxaban) in real world settings will be recorded in this register. Within this register a characterization of patients and therapy (with regard to medication, dose and duration) will be done. On basis of defined clinical relevant end points the long-term efficacy and safety will be evaluated.

This is an observational multicenter registry of atrial fibrillation catheter ablation performed using the ablation index technology.

Atrial fibrillation (AF) is one of the most common arrhythmias. Its repeated fluctuations in ventricular rate and irregular heart rhythm not only reduce exercise tolerance and quality of life, but also cause hemodynamic changes. The incidence of stroke is increased by 5 times or more compared with the average person. According to statistics, the annual mortality rate from stroke due to atrial fibrillation is about 20%-25%. Of course, like other cardiovascular diseases, atrial fibrillation occurs in a large proportion of the elderly population. According to statistics, 80% of patients with atrial fibrillation are 65 years of age or older. With the aging of the world's population, especially in the 21st century, the proportion of patients with atrial fibrillation has increased year by year. The treatment of atrial fibrillation involves many aspects such as switching to sinus rhythm, controlling heart rate and anticoagulant therapy, which is a long course affecting the adherence of AF patients. AF is a kind of disease that can be preventable and controllable. The out-of-hospital care for AF patients has been proved to reduce the mortality and unexpected readmission rate, but there are still high costs, poor compliance, low management efficiency and etc. Telemedicine was believed to solve these problems to further reduce the mortality of AF patients. The latest ESC Heart Failure Guidelines emphasis the significance of telemedicine in AF, however, it didn't provide a standardized AF remote management system.

This study evaluates cardiac structure and function differences between healthy endurance trained athletes with atrial fibrillation and healthy age matched endurance trained athletes without atrial fibrillation. It is hypothesized that despite having similar structural adaptations of the heart (due to endurance training), athletes with atrial fibrillation display will impaired heart functional measures compared to endurance athletes without atrial fibrillation.

The benefit of a drug-eluting stent (DES) in patients with acute myocardial infarction (AMI) is controversial. This study will aim to observe the effect of a DES on the risk of new-onset AF in patients with AMI.

The aim of the study is to compare levels of differnts types of microparticles circulating before and after percutaneous occluding of the left atrium by patients with atrial fibrillation and patients control. Hypothesis is that prothesis implantation will decrease levels of microparticles circulating in blood circulation because of occluding of the left atrium .

The main aim of the study is to investigate the prevalence and characteristics of ischemic stroke patients with atrial fibrillation and concurrent carotid atherosclerosis. Additionally, this study will investigate the effect of concurrent carotid atherosclerosis on the outcomes of recurrent stroke, myocardial infarction and death during follow-up

Atrial fibrillation (AF), often referred to as an 'irregular heartbeat', is the most common abnormal heart rhythm worldwide. AF may be intermittent (termed paroxysmal) or sustained (termed persistent).Catheter ablation is increasingly being used to manage individuals with AF, however in a significant proportion of cases AF recurs. Such rhythm control interventions are known to be less effective in individuals with persistent AF compared with those with paroxysmal AF. Analysis of heart tissue of individuals with AF show deposition of scar tissue within the heart muscle and this scar tissue promotes abnormal electrical activity that is involved in causing AF. The aim of the proposed study is to evaluate the feasibility and effectiveness of combining conventional pulmonary vein isolation (PVI) during catheter ablation for AF with adjunctive substrate ablation.

Patients undergoing percutaneous coronary intervention (PCI) with stent implantation and requiring chronic anticoagulation for atrial fibrillation (AF) with a CHA2DS2-VASc >1 are required to receive triple antithrombotic therapy . This triple therapy includes dual antiplatelet therapy with clopidogrel and aspirin in combination with an oral anticoagulant with either a vitamin K antagonist (VKA) or an oral anticoagulant (NOAC). Recently NOAC, inhibiting the IIa (dabigatran) or Xa (rivaroxaban and apixaban) in the coagulation cascade have demonstrated non inferiority compared to VKA to prevent thrombo-embolic events in non-valvular AF for patients with a CHA2DS2-VASc >1 . Interestingly, NOAC are associated with a reduced fatal bleeding rate compared to VKA. Overall they seem to result in a lower bleeding rate compared to VKA in association with antiplatelet agents. Recently European guidelines regarding patients requiring chronic anticoagulant therapy and undergoing coronary stent implantation have been updated. However they are based on an expert consensus because of the scarce data available. These guidelines advocate the combination of dual antiplatelet therapy with clopidogrel and aspirin in combination with the lower dose of OAC or VKA with a target INR between 2 and 2.5 . The triple therapy should be prescribed for 1 to 6 months depending on the bleeding and thrombotic risk and the clinical setting. In patients with high bleeding risk the guidelines suggest that a sole antiplatelet agent could be used in addition to anticoagulation following the WOEST study . In the recently published ESC guidelines on the management of atrial fibrillation, despite the lack of new data, the expert advocate triple therapy followed by dual antiplatelet therapy in most patients for 12 months. The recently published PIONEER study reinforced the possibility of the use of rivaroxaban in these patients. In this trial including ACS and not ACS patients undergoing PCI rivaroxaban 15 mg in addition to a P2Y12 ADP receptor antagonist was associated with less clinically relevant bleeding compared to triple therapy with VKA- aspirin and clopidogrel and similar efficacy .