View clinical trials related to Atrial Fibrillation.
Filter by:The purpose of this study is to determine, among a large cohort of 300 consecutive patients with hypertrophic cardiomyopathy, if extended ambulatory monitoring using the iRhythm Technologies, Inc. Zio XT device results in identifying a greater burden of nonsustained ventricular tachyarrhythmia (nsVT) compared to current ACCF/AHA guideline recommended 48-hour monitoring.
Atrial fibrillation (AF) and atrial tachycardia (AT), including type I atrial flutter, are frequently observed in patients with pulmonary hypertension (PH). Catheter ablation of AF / AT has been established as an effective treatment option in selected patients. However, little is known about the efficacy and safety of this approach in patients with PH. It has also been shown that considerable proportion of patients with PH after acutely successful catheter ablation suffer from the recurrence of clinical or newly manifested arrhythmia. We propose a prospective study to compare two ablation strategies in a randomized fashion: radiofrequency catheter ablation targeting only the clinical arrhythmia versus more extensive substrate-based catheter ablation. This project will investigate the clinical outcome of patients with pulmonary hypertension and symptomatic atrial fibrillation / tachycardia who will be randomly allocated to selective versus complex radiofrequency catheter ablation of arrhythmogenic substrate.
A retrospective cohort study of Thai octogenarians with nonvalvular atrial fibrillation (NVAF) initiating apixaban, dabigatran, rivaroxaban or warfarin was conducted in medical school hospital in Thailand. Patients were recruited from January 1, 2013, to December 31, 2018. The efficacy outcome was early recurrence of stroke or transient ischemic attack (TIA) in 90 days after initiation of oral anticoagulants (OACs). The safety outcome were major bleeding and clinically relevant non-major bleeding complications in 180 days. Continuous variables were compared using independent t test and MannWhitney U test, and categorical variables were compared using chi-square test or Fisher's exact test. Furthermore, hazard ratios and P values were calculated by the use of multivariable Cox's regression analysis.
Validity and reliability of the Turkish version of 'Atrial Fibrillation Impact Questionnaire (AFImpact)' will be evaluated in the study.
This is a trial to assess the effectiveness of an atrial fibrillation (AF) risk prediction algorithm and diagnostic test for the identification of patients with atrial fibrillation
This is a study evaluating the value of defragmentation of sinus rhythmic low voltage areas in addition to isolation of pulmonary veins in the removal of recurrent atrial fibrillation. The invasive procedure will be performed according to the procedures chosen by the rhythmologist and will in no way be modified by the patient's enrollment in the study. Similarly, the frequency of consultations, date and nature of the additional examinations will be defined by the physician, with the purpose of monitoring the patient.
The proposed clinical study aims at validating the diagnostic performance, in comparison with a reference ECG, of Withings HWA08 watch for the automatic identification of atrial fibrillation (AF).
Background: Biphasic truncated exponential (BTE) waveforms are standard for cardiac defibrillation and synchronized cardioversion up to date. BTE waveforms differ by design characteristics and technologies for pulse commutation (rectilinear, standard truncated exponential, pulsed). Clinical evaluation of BTE waveforms can be planned during cardioversion (CVS) as a well-established procedure of atrial fibrillation patients who are able to give consent and also present a more controlled population. Scarce studies have been found to present the relative efficacy and safety of different BTE waveforms during CVS. The validity of significantly deviating results of the pulsed waveform in one CVS study is questionable. Objective: To compare the CVS efficacy and safety two different biphasic defibrillators - a standard truncated exponential waveform and a pulsed biphasic waveform. Experimental design: Patients will be recruited at the Intensive Cardiology Care Unit (ICCU), Cardiology Clinic, University National Heart Hospital (NHH), Sofia, Bulgaria, underwent the pre-CVS medical exams and check for eligibility. All eligible patients will sign a written informed consent prior to the CVS and will receive the standard hospital procedures during CVS, accepted in the NHH, and approved by the NHH Local Ethic Committee. Atrial fibrillation patients will be alternatively randomized to CVS using one of the two defibrillators, following the same energy selection protocol in both defibrillators. The statistical power analysis will consider a non-inferiority comparison between the cumulative energy actually delivered by both defibrillators. The secondary CVS outcome measures are: the cumulative success rate (measured at 1 minute post-shock) and number of delivered shocks. Delivered energy will be measured during each shock with a dedicated pulse recording device (approved by the NHH Local Ethic Committee). Heart rhythm will be monitoring in continuously recorded peripheral ECG. The secondary CVS safety outcome measures: Biochemical markers for myocardial necrosis (high sensitive troponin I - hsTnI, creatine kinase MB fraction - CK-MB) will be evaluated on blood samples taken before and 12 hours after cardioversion; ST-segment changes will be measured in lead II (baseline and 10 s post-shock) and 12-lead ECG; Complications after cardioversion will be measured during 2 hours follow-up period in the ICCU.
The proposed clinical study aims to validate the effectiveness of the WPM04 blood pressure monitor developed by Withings as a diagnostic tool for cardiovascular disorders. The detection of cardiovascular disorders is oriented along three axes, namely the measurement of blood pressure, the identification of rhythm disorders such as atrial fibrillation and the identification of heart murmur indicating valvular heart disease.
This study is a post-market clinical follow-up (PMCF) study to identify and evaluate residual risks associated with the use of the BIOMONITOR III and BIOMONITOR IIIm that are discovered or remain even after risk analysis, risk mitigation and successful conformity assessment. Furthermore, this study will also provide additional data as required by regulatory authorities outside of the CE-region.