Active clinical trials for "Atrial Fibrillation"

The aim of this study is to analyse blood pressure during rate control therapy in patients with tachycardic atrial fibrillation in a real-world emergency cohort.

Qatar Cardiovascular Biorepsoitory-AF (QCBio-AF) of plasma and DNA of Qatari patients with atrial fibrillation (AF) is to establish. AF cases will include patients with acute and chronic AF identified in the Heart Hospital (HH) arrhythmia clinics and Emergency Room (ER). Controls will include blood donors who have no history of AF. Such a resource will enable validation of biomarkers to assess AF risk, response to therapy, and prognosis. QCBio-AF will also allow genomic, marker and proteomic studies of AF and response to drug therapy (pharmacogenetics and pharmacoproteomics). This study will accomplish the following specific aims: Aim 1: Establish a DNA and plasma biorepository (QCBio-AF) of 300 Qatari AF cases and Family members to enable investigation of genomic and proteomic biomarkers for early detection and prognostication and to identify new targets for drug development. Aim 2: Annotate the biorepository of with 1) demographic, laboratory, and clinical variables derived from the EMR using electronic phenotyping algorithms, and 2) detailed information regarding history of cardiovascular diseases and risk factors derived from patient surveys. Aim 3: Develop processes to promote use of the biorepository by Qatari investigators by facilitating access to the biorepository for biomarker research, while maintaining the highest ethical standards with emphasis on patient confidentiality and stewardship of the biospecimens. Timeline. Following IRB approval, the intended collection period will be over 12 months where 300 Qatari patients with AF and their immediate families will be recruited. Significance: Although atrial fibrillation (AF) is reaching epidemic proportions in the aging U.S. and European populations, the worldwide burden of AF in non-white populations is unknown. Furthermore, a substantial proportion of AF in the population is not explained by traditional risk factors. There is increasing evidence that susceptibility to AF is not only determined by underlying etiologic risk factors but also ethnicity with AF occurring more frequently in white than in non-white populations. While reasons for this ethnic variability are unknown, studies have shown that both common and rare genetic variants increase susceptibility to AF in an individual in the presence of ethnic-specific risk factors.

To evaluate the effects of mechanical left atrial appendage (LAA) closure for secondary prevention of stroke in the patients with nonvalvular atrial fibrillation

The present study is designed as a observational prospective, multicentre, international. The main aim of this study is to evaluate the safety and feasibility of SVC isolation with the CB in a prospective manner.

The purpose of this registry is to assess the performance and clinical effectiveness of a combination of SJM mapping and ablation products in the treatment of subjects with atrial fibrillation (AF).

This is a prospective, multi-center, research study designed to evaluate the acute achievement of pulmonary vein (PV) isolation with ThermoCool SmartTouch (ST) and ThermoCool SmartTouch SF (STSF) catheter using the Ablation Index Module.

Atrial fibrillation is a common arrhythmia which requires electrical cardioversion in many patients in order to regain sinus rhythm. In a previous retrospective study a complication of acute renal failure was found in 17% of the patients after cardioversion.(The incidence and prognosis of renal dysfunction following cardioversion of atrial fibrillation. Helman Y,...Gilon D et al:Cardiology 2013;124(3);184-9.) Another complication previously described after cardioversion is pulmonary edema. In this prospective study the investigators aim to evaluate the risk of acute renal failure post cardioversion. In addition the investigators would like to evaluate hemodynamic changes, fluid balance and sodium levels in patients post cardioversion as a potential mechanism for both acute renal failure and pulmonary edema post cardioversion. In order to assess hemodynamic changes the investigators will use a non-invasive FDA approved device called NICaS (Non-Invasive Cardiac System). This system calculates cardiac output, cardiac index and peripheral vascular resistance in a non-invasive, fast and accurate way.

This is a retrospective observational study drawing on data from the Brigham and Women's Home Hospital database. Sociodemographic and clinic data from a training cohort were used to train a machine learning algorithm to predict patient deterioration throughout a patient's admission. This algorithm was then validated in a validation cohort.

Prospective observational single center trial, evaluating the safety, radiation exposure and efficacy of remote magnetic catheter ablation for atrial fibrillation in daily routine.

The goals of our study are to determine a).the association between abnormal circadian BP and the development of paroxysmal AF in hypertensive patients, b).at which level of TOD, paroxysmal AF episodes are detected in hypertensive subjects, c).if there is any association between systolic and/or diastolic BP levels with AF occurrence, d).whether the mean heart rate during a 24-hr interval is associated with the development of paroxysmal AF, and finally e).examine the relationship between a wide PP and asymptomatic AF episodes in patients with HTN.