View clinical trials related to Atrial Fibrillation.
Filter by:The investigators are conducting a prospective, observational study to examine the ECG waveforms captured by the new medical device as compared to a traditional Holter monitor for subsequent use in visual diagnoses of atrial and ventricular arrhythmias as well as cardiac impulse and/or conduction disorders by qualified clinicians. The hypothesis is that this new medical device prototype is non-inferior to traditional Holter monitoring for capturing ECG waveforms that can be visually assessed for atrial and ventricular arrhythmias as well as disorders of cardiac impulse formation and/or conduction.
The VICTORIA Study (Vascular CalcIfiCation and sTiffness induced by ORal antIcoAgulation) is a comparative, parallel, prospective, controlled and randomized study of the structural and functional impact of rivaroxaban versus anti-vitamin K drugs on the arterial vasculature.
Purpose 1. To validate 2 -day loop recording ( R.Test Evolution 4 ) to 2 -day Holter recording (gold standard) for the detection of atrial fibrillation of ≥ 30 seconds duration in a consecutive population of patients with stroke or transient ischemic attack (TIA). 2. To determine whether short run of atrial fibrillation (< 30s ) or the presence of many supraventricular extrasystoles detected on Holter recording, is associated with risk of re-stroke in a consecutive population of patients with stroke or TIA . 3. To test whether a 7-day Loop Recording (R -test) detects more patients with atrial fibrillation than 2 days of Holter recording in a consecutive population of patients with stroke or TIA.
This study is being conducted to collect data on the management of major bleeding events occurring in patients with atrial fibrillation taking dabigatran etexilate.
The aim of this study is to evaluate the role of atrial fibrillation (AF) and its treatment in relation to thromboembolic events (stroke, and transient ischemic attacks) and intracranial hemorrhage. Primary Outcome Measures: - Incidence and timing of intracranial complications (stroke,TIA, bleedings) in relation to diagnosis and anticoagulation treatment of AF during the study period; comparison of complications between those with and without anticoagulation treatment according to CHADSVASc score. Secondary Outcome Measures: - The effect of anticoagulation pauses and INR level on stroke and bleeding risk; strokes within 30 days after anticoagulation pause and the prevalence of stroke and intracranila bleeding in relation to INR level < 2, 2-3 and >3. - Trauma as a risk factor for intracranial bleeding: percentage and risk factors for intracranial bleeding with or without trauma. Type of preceding trauma and type of intracranial bleeding. - The time relation between diagnosis of AF and type of intracranial complications: Kaplan Meier analysis of thrombotic (Stroke/TIA) and intracranial bleeding complications after 1st diagnosis of AF in patients with and without anticoagulation - The risk of stroke and intracranial bleeding in relation to CHADSVASc score, HAS-BLED score and anticoagulation/antithrombotic treatment - Prognosis of stroke and intracranial bleeding: 30-day mortality after stroke and intracerebral bleeding in patients with and without anticoagulation - Factors related to underuse of anticoagulation treatment. Data on reasons for not starting or stopping aticoagulation in those with indication of oral anticoagulation - Operations and procedure as risk factor for stroke: Frequency and type of operations performed < 30 days before stroke. Data on length of perioperative pause in anticoagulation and use of bridging therapy and timiing of stroke are collected. - Cardioversions as a risk factor for stroke: Frequency of stroke and TIA < 30 days after cardioversion in relation to use of anticoagulation and CHADSVASc score - The risk of stroke and intracranial bleeding in relation to type of AF (permanent, persistent, paroxysmal) and concomitant carotid disease Estimated Enrollment: 6000 patients.
Postoperative bleeding is a common consequence after heart surgery which can significantly impact outcomes and costs . When bleeding occurs, reliable postoperative blood evacuation of the pleural, mediastinal and pericardial spaces with chest tubes is imperative to facilitate pulmonary reexpansion and mediastinal decompression as the patient recovers. When postoperative blood evacuation is inadequate, complications from retained blood can result. Clinically, retained blood may be recognized acutely or sub acutely. The acute clinical presentation is usually blood and fresh thrombus around the heart or lungs presenting as tamponade or hemothorax. The subacute clinical presentation is bloody pleural or pericardial effusions. These effusions are often driven by the breakdown of remaining thrombus. Once retained blood occurs, subsequent procedures may be needed to remedy it. Interventions to remove postoperative pericardial and/or pleural fluid or blood and reoperations due to bleeding are captured under a composite termed Retained Blood Syndrome, or RBS. The need for treatment and interventions for these conditions represents an impediment to patient recovery and involves both resource and economic consumption for a heart program and the healthcare system at large. A recent review of the literature indicates that additional procedures for RBS are demonstrated in approximately 15% to 20% of patients after heart surgery. In a prospectively collected US Nationwide Inpatient Sample (NIS) data from 2010, RBS could be demonstrated in 17% of patients. In this analysis, mortality was doubled from 4% to 8%, length of stay was increased by 5 days, and average costs were 55% higher. Patients with RBS, therefore, represent an increased at-risk population for complications and costs. Postoperative obstruction of conventional chest tubes with blood and other fibrinous material in the setting of postoperative bleeding contributes to RBS. In a study of postoperative cardiac surgery patients at the Cleveland Clinic, 36% of patients were found to have evidence of chest tube obstruction. Active Clearance with PleuraFlow has been shown to prevent chest tube clogging, and reduce RBS. The purpose of this registry is to evaluate the effectiveness of the PleuraFlow System, a commercial Class II (US), Class IIb (Canada, Europe, and Australia), in the management of blood evacuation after cardiac surgery.
The primary aim of this prospective observational study is to investigate whether an enhanced diagnostic MRI work-up (including cardiac MRI, angiography of the aortic arch and the brain-supplying arteries) combined with an in-hospital Holter-ECG of up to 5 days duration leads to a significant increase in relevant pathologic findings with respect to stroke aetiology as compared to the findings obtained by a routine diagnostic work-up (including stroke unit monitoring, 24h-Holter-ECG, echocardiography, Doppler-ultrasound of the brain-supplying arteries) in patients with acute ischemic stroke and no atrial fibrillation according to past medical history or baseline ECG. A better understanding of the stroke aetiology may improve secondary stroke prevention and long term outcome.
To evaluate reduction of fluoroscopy time/dosis and safety of atrial fibrillation ablation in patients with paroxysmal atrial fibrillation using fluoroscopy image integrated 3-dimentional electroanatomical mapping system, comparing to using 3-dimentional electroanatomical mapping system without fluoroscopy image integration
The purpose of this study is to compare the therapeutic strategies of rate control versus rhythm control in cardiac surgery patients who develop in-hospital postoperative atrial fibrillation or atrial flutter (AF). In patients who develop AF during hospitalization after cardiac surgery, the hypothesis is that a strategy of rhythm control will reduce days in hospital within 60 days of the occurrence of AF compared to a strategy of rate control.
EFFICAS II proposes to test the hypothesis that treatment efficacy correlates to contact force parameters applied for pulmonary vein isolation (PVI) during AF ablation.