Active clinical trials for "Atrial Fibrillation"

The purpose of this study is to compare rotational angiography (3DATG technology)intra-procedure (during the ablation procedure) with CT (x-ray) pre-procedure (before the ablation procedure) fusion to create an anatomical picture of a heart to help adequately guide an ablation procedure for patients with arrhythmias.

According to recent guidelines, long-term anticoagulation is recommended for patients with atrial fibrillation (AF) and a risk profile with CHA2DS2-VASc score of 1 or more. Vitamin K antagonists(VAK) and novel oral anticoagulants such as rivaroxaban are current treatment options for AF patients with additional risk factors for stroke. Currently there are only limited information to what extend AF patients prefer one or the other treatment option based on patient relevant characteristics of novel oral anticoagulants vs. VKAs. It is also unknown which of the characteristics influences patient preference most and how this relates to a neutral comparator. Furthermore, an additional unknown factor is also how patient evaluate their current treatment and if this leads to differences among treatment with VKAs and rivaroxaban.

This study tested the hypothesis that response to digoxin is modulated by single Nucleotid Polymorphism (SNP): Multi Drug Resistance (MDR1) gene haplotypes and Solute carrier organic anion transporter family member 1B3 (SLCO1B3) gene Polymorphism and their role in the response to treatement. Aldosterone synthase (CYP11B2) gene and sodium channel, voltage-gated, type V alpha subunit gene (SCN5A) correlated with atrial fibrillation and their roles in response to digoxin.

The purpose of this study is to improve secondary prevention of ischemic stroke patients by Estimating prevalence and the prognostic significance of frequent premature atrial complexes in ischemic stroke patients in relation to death, recurrent stroke and atrial fibrillation. Characterize ischemic stroke patients by Echocardiographic characteristics Biochemical markers Plaque composition in the carotid arteries in order to improve risk stratification.

Ablation of atrial fibrillation (AF) using pulmonary vein isolation is employed when patients do not respond favorably to medical therapy. Successful procedures are accomplished in the majority of patients, but the outcome after many years of follow-up after ablation is unknown.

Thrombus outcome data will be collected retrospectively during 2011-2012 as a historical baseline of SoC with oral VKA (Vitamin K Antagonist(s) for the treatment of patients with nonvalvular AF or atrial flutter documented with LA/ LAA thrombi on transesophag-eal echocardiography (TEE). The study is a company-sponsored, global, multi-center, retrospective, non-interventional study. Patients who suffered from hemodynamically stable nonvalvular AF or atrial flutter and had a diagnosed LA/ LAA thrombus between January 1st, 2011 and December 31st, 2012 will be identified through screening and review of medical records and included in the registry. Retrospective patient data will be collected from May 2nd, 2013 to May 2nd, 2014. The observation of each patient will cover the period from the diagnosis of an LA/ LAA thrombus until the end-of-treatment TEE following the 3-12 week SoC anticoagulation (AC) therapy. If no end-of-treatment TEE has been performed during 3-12 weeks of AC therapy, the observational period will end at 12 weeks after diagnosis at the latest. If more than one TEE was performed during treatment, the thrombus outcome will be collected from the last TEE performed within 12 weeks of treatment start.

To acquire a better understanding of the spontaneous clinical behavior of paroxysmal tachycardia by studying epidemiologic features of symptomatic tachycardia patients.

This study assess the accuracy of a blood pressure monitor designed to detect atrial fibrillation. Subjects use the blood pressure monitor on a daily basis for 30 days and compare the readings to an ECG done at the same time.

Subjects eligible for this study have an irregular heartbeat called atrial fibrillation (AF)and who are scheduled for a procedure that involves applying electrical energy in your pulmonary veins, which is usually the site where this abnormal rhythm begins, or pulmonary vein ablation We will examine the size and function of the left atrium (one of the 4 chambers of your heart) and the pulmonary veins before and after your ablation. This will be done by getting extra measurements during tests you will be having done which are ICE (intra cardiac echocardiography), TEE (transesophageal echocardiography) and CT scan (computed tomography), and drawing some blood samples. The purpose of getting these extra measurements and blood samples is: to see whether TEE measurements done before your ablation can tell us if your atrial fibrillation may come back after you ablation; to see if TEE measurements look different before and after your ablation; to see if a blood test can tell us if your atrial fibrillation may come back after your ablation; to look at how often pulmonary vein narrowing is found by TEE compared to how often it is found by CT scan. During the clinically indicated tests the doctor has ordered (TEE, ICE, CT scan), there will be additional measurements taken as a part of this research. This means that the TEE exam will last an additional 10-15 minutes, and the ICE procedure will last an additional 5-10 minutes. There is no additional time needed for the CT scan. In addition, we will be drawing 20 cc of blood (approximately four teaspoons). The regularly scheduled follow up visit is usually three months after your ablation, we will again be getting some extra measurements from the TEE and CT scan. This will add about 10-15 minutes to the TEE test, but no additional time will be needed for the CT scan. In addition, we will be drawing 10 cc of blood drawn (approximately two teaspoons). A ventilation-perfusion scan of the lungs will also be performed as part of standard clinical care if significant PV stenosis is found by CT and/or TEE.

Patients undergoing lung resection due to pulmonary cancer can be compromised in their postoperative period due to atrial fibrillation. A retrospective analysis performed at our institution indicates that 30 % of the population develope atrial fibrillation in the postoperative period. Amiodarone is known to diminish the occurence of postoperative atrial fibrillation after heart surgery, why this drug is chosen as a prophylactic agent for the mentioned population. Amiodarone is administrated twice a day for 5 days at a dose of 600 mg oral treatment after an initial loading bolus og 300 mg intravenously.