View clinical trials related to Atrial Fibrillation.
Filter by:This prospective randomized study aims to investigate the effect of continuous versus interrupted use of Amiodarone on the procedure outcome in long-standing persistent (LSP) atrial fibrillation patients undergoing pulmonary vein antral isolation (PVAI).
This prospective, randomized study aims to compare the impact of ablation of perimitral flutter only versus cardioversion and repeat isolation of pulmonary veins with ablation of additional triggers, on procedure outcome.
A large left atrial (LA) volume, which represents chronic diastolic dysfunction, is associated with a poor outcome, regardless of systolic function. Thus, the LA volume provides a long-term view of whether the patient has diastolic dysfunction, regardless of the loading conditions present at the examination, such as hemoglobin A1c in diabetes mellitus. To date, the relation between the LA volume and left ventricular (LV) filling pressure has not been confirmed directly by simultaneous echocardiographic catheterization. The present study, therefore, assessed the correlation between the LA volume and LV filling pressure in patients with severe mitral regurgitation (MR). Because the LA pressure increases to maintain adequate LV diastolic filling, increased atrial wall tension tends to dilate the chamber and stretch the atrial myocardium. Therefore, the lower the ability of the left atrium to stretch, the greater the pressure in the left atrium. The study is designed to assess 1) the relationship between LV filling pressure and LA distensibility, and 2) the power of left atrial distensibility to predict the prognosis, including operation mortality, the rate of post-operation atrial fibrillation, and late heart failure event in patients with severe mitral regurgitation.
The ORBIT-AF registry will be a multicenter, prospective outpatient disease registry to identify "real world" treatment patterns of atrial fibrillation. The registry will describe this patient population with regards to demographics, clinical factors, risk stratification, and geographic regions. In particular, attention will be focused on the utilization, effectiveness, and safety of antithrombotic therapies in the prevention of stroke. The registry is designed to identify reasons and risk factors for non-receipt of anticoagulation (AC) therapy, as well as reasons why AF patients who are prescribed AC therapy do not take them.
The purpose of this study is to gather information about the size and shape of patients' hearts in order to design a device.
The aim of this study is to identify the most appropriate method for managing patients with AF recurrences after the first ablation procedure, through the diagnostic data stored by a subcutaneous AF monitor.
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.
The purpose of this clinical study is to collect simultaneous, multiple view cardiac signals representing both transvenous ICDs (T-ICD) and sensing vectors from the subcutaneous implantable defibrillator system (S-ICD). Upon completion, this data will represent the first true database capable of comparing detection characteristics of transvenous and subcutaneous ICDs. Future protocols will be created to dictate the specific methods of such comparisons.
Atrial fibrillation (AF) is the most common sustained dysrhythmia encountered in clinical practice in North America and Europe, accounting for approximately one-third of all hospitalizations for a cardiac rhythm abnormality. The presence of AF markedly increases the patient's risk for developing arterial embolism and stroke, depending on the presence of other clinical conditions, such as hypertension and diabetes. AF is associated with a fivefold increased risk for stroke, and is estimated to cause 15% of all strokes. Patients with AF frequently have several risk factors for atherosclerosis, including hypertension, diabetes, and dyslipidemia. Accordingly, systemic signs of atherosclerosis can be detected in AF patients, and these likely accounts for an enhanced risk of coronary heart disease. In addition to cerebrovascular disease, patients with AF may suffer from coronary events including myocardial infarction (MI), but the rate of MI in AF patients seems to be variable, but often underestimated. Moreover, coexistence of peripheral arterial disease (PAD) is a relevant clinical sign of systemic atherosclerosis. Ankle-brachial index (ABI) is a simple, inexpensive, and non-invasive PAD measurement, even at the pre-symptomatic phase when intervention can improve prognosis and prevent or delay severe complications ABI is calculated by measuring the systolic blood pressure in the posterior tibial and/or the dorsalis pedis arteries either in both legs or 1 leg chosen at random (using a Doppler probe or alternative pulse sensor), with the lowest ankle pressure then divided by the brachial systolic blood pressure. In addition to peripheral artery disease, the ABI also is an indicator of generalized atherosclerosis because lower levels have been associated with higher rates of concomitant coronary and cerebrovascular disease, and with the presence of cardiovascular risk factors. Two large studies in patients with AF document the existence of PAD in about 3-5% of patients. It is possible, however, that such an incidence has been underestimated as only symptomatic patients were considered as affected by PAD. As PAD is an important marker of systemic atherosclerosis, its association with AF reinforces the concept that patients with AF have systemic atherosclerosis that potentially account for coronary complications. To date, a national registry of AF patients is not available to verify the real impact of cardiovascular events in this clinical setting.
The aim of the study is to assess the incidence of patients suffering from ischemic stroke or transient ischemic attacks who have underlying asymptomatic paroxysmal atrial fibrillation. Patients who have suffered an ischemic stroke or transient ischemic attack, without a history of atrial fibrillation, are planned to be included. Starting within 14 days of the ischemic stroke, participating patients are asked to perform 10 second ECG recordings using a handheld ECG device twice daily (mornings and evenings) during 30 days. These recordings are transmitted via telephone to a secure encrypted Internet site. Within these 30 days the participants also perform an ambulatory 24 hour Holter recording. Handheld ECG recordings are evaluated continuously. In case of atrial fibrillation the patient is informed and offered treatment with anti coagulant medication (Warfarin). The investigation is a comparison between 24 hour continuous ECG recordings and short intermittent ECG recordings twice daily over a longer time period to determine which method is the best to detect atrial fibrillation in this patient group. Hypothesis: Short Intermittent ECG recordings over a longer time period is more efficient, compared with continuous 24 hour ECG recordings, in detecting silent paroxysmal AF in patients with an ischemic stroke and without a history of atrial fibrillation.