Active clinical trials for "Atrial Fibrillation"

This study aims to evaluate the utility of the atrial electromechanical interval and pulse wave velocity in the prediction of recurrence of atrial fibrillation among patients who underwent successful direct current cardioversion for atrial fibrillation.

The purpose of this observational study is to collect data regarding the population of patients implanted with St. Jude Medical ICD.

This registry is a data collection on patients who are implanted for more than 6 months with a pacemaker. Frequency and distribution of right ventricular pacing, NYHA class and left ventricular ejection fraction shall be documented.

This is an open-label study to investigate the functional features of prolonged monitoring by 14-day EZYPRO® to improve the medical care and/or diagnosis for the patient with arrhythmia. Patients will be enrolled by outpatient basis from two clinical study sites. Enrolled patients will wear a traditional 24-hour Holter monitor and an 14-day EZYPRO® which can provide monitoring data for up to 14 days. This study will allow a direct comparison between two devices.

The objective of this registry is to find out if there is a difference in patient satisfaction and rate of vascular and bleeding complications with use of Perclose Proglide system or F08S for venous closure post atrial fibrillation and atrial flutter procedures in comparison to manual compression.

BACKGROUND: Atrial fibrillation (AF) is the most common serious heart rhythm disorder and is associated with a 4 to 5-fold increase in the risk of ischemic stroke. AF is often detected for the first time while a patient is hospitalized for an acute medical illness or after surgery. In these settings, AF can be transient and frequently asymptomatic; detection often occurs during prolonged periods of continuous ECG monitoring in an intensive care unit (ICU). Atrial Fibrillation Occurring Transiently with Stress (AFOTS) describes the manifestation of AF in the acute care setting as the only evidence of AF, for which the incidence and appropriate management are uncertain. AFOTS may be directly and uniquely due to a reversible precipitant and thus unlikely to recur after this precipitant is removed, thereby having minimal impact on the patient's long-term prognosis. Alternatively, AFOTS may be the first detection of a chronic condition that is already present but undiagnosed - facilitated by inpatient continuous ECG monitoring. Previous published studies have provided a wide range of estimates for the incidence of AFOTS in the ICU population (3-44%). Differences in estimates may be explained by the methods used to detect AFOTS in these studies. A precise estimate of the incidence of AFOTS is required in order to understand its long-term significance. The present study is designed to generate an accurate estimate of the incidence of AFOTS. PRIMARY OBJECTIVE: To determine the incidence of AF, lasting 30 seconds or more, in hospitalized patients in the ICU over the age of 65 and without a prior history of AF. This will be achieved with a high-sensitivity, 14-day continuous ECG monitor. IMPORTANCE: AFOTS may be common, and may respond to established therapies for stroke prevention. However, varying methodologies in existing studies have resulted in wide variations around its incidence. The systematic protocol employed in this study will generate a precise and accurate estimate of the incidence of AFOTS. There is uncertainty around the incidence, recurrence and management of AFOTS. The results of this study will be integrated with those from the other studies in the AFOTS research program. Together, they will inform the monitoring of hospitalized patients for AFOTS, the outpatient rhythm monitoring for recurrences of AF and ultimately stroke prevention. STUDY DESIGN: This is a prospective descriptive epidemiologic study. It is a component study of the AFOTS Research Program. POPULATION: Consecutive participants aged 65 years and older without a history of AF, who are admitted to the ICU at Hamilton General or Juravinski hospital for treatment of medical illness or for recovery from noncardiac surgery. OUTCOMES: The primary outcome will be the proportion of patients with AF lasting 30 seconds or more, as detected by the patch monitor. Secondary outcomes will include: the proportion of patients who have AF documented by the clinical team; the proportion of patients with AF lasting 5 minutes or more, 1 hour or more, 6 hours or more and 24 hours or more; the burden of AF, defined as time spent in AF per 24 hours and the proportion of AF episodes that occur with an average heart rate of 1-40 bpm, 41-60 bpm, 61-80 bpm, 81-100bpm, 101-120 bpm, and 121-140 bpm and > 140 bpm.

The investigators aim to test the thrombotic potential of various heart chambers including left atrium, left atrial appendage, right atrium and peripheral veins. Blood samples will be taken from the different chambers in 50 patients admitted for standard pulmonary vein ablation and compared to patients without atrial fibrillation admitted for left sided supra ventricular tachycardia or mitral clip. Thrombin generation parameters will be assessed by the calibrated automated thrombogram.

The study aims to compare 3 techniques routinely used for paroxysmal atrial fibrillation ablation: radiofrequency catheter ablation without contact-force, radiofrequency catheter ablation with contact-force and cryoablation. The hypothesis is the non-inferiority between the 3 techniques in terms of free-from atrial fibrillation survival (primary criteria). It will also compare lenght of procedure, radioscopy time and immediate complications (secondary criteria).

This is a prospective, non-randomized study to refine the Study Watch's algorithm for AF detection within both persistent and paroxysmal AF subjects. The study will also collect data from an FDA-cleared wearable ECG sensor.

The main objective of this project is to evaluate savings in direct costs as regards the use of rivaroxaban versus vitamin K antagonists (VKAs) in routine clinical practice using data from three cohorts of patients receiving VKAs or rivaroxaban in Spain, including the time in therapeutic range (TTR) values of the same and the incidence of events in the first year following diagnosis.