Active clinical trials for "Syncope"

The purpose of this study is to evaluate the diagnostic yield (at 1 month post enrollment) of an external loop recorder (SpiderFlash-T) in patients with syncope or palpitations of suspected arrhythmic origin, within 30 days before enrollment.

The investigators want to look at how patients admitted after passing out (syncope) or nearly passing out (pre-syncope) do after going home and how many of them remain free of symptoms of syncope or pre-syncope.

This study was designed to validate the "San Francisco Syncope Rule". This set of rules was derived by Quinn et. al. to help guide the treatment of patients evaluated in the Emergency Department who had an episode of syncope (passed out) or near syncope (almost passed out). A rule that considers patients with an abnormal ECG, a complaint of shortness of breath, hematocrit less than 30%, systolic blood pressure less than 90 mm Hg, or a history of congestive heart failure was shown predict with a good degree of accuracy which patients would have an adverse event and require admission.

Evaluation of commitment of resident physician to the guidelines as regard management of cases of syncope at Assiut University Children Hospital and correction of the defect that will be discovered.

This is a multi-centre, registry-based study whose primary objective is to evaluate the effect of treatment for sleep apnoea syndrome (SAS) on the number of syncope/malaise episodes in a population suffering from both idiopathic, recurrent vasovagal syncope/malaises and SAS.

This study is designed to evaluate the accuracy of the National Institute for Health and Clinical Excellence (NICE) guideline 'red flags' to identify patients at high risk of short term serious outcome when presenting in the emergency department (ED) with Transient Loss of Consciousness (TLoC). Red flags were defined as ECG abnormality, history or physical signs of heart failure, TLoC during exercise, family history of sudden cardiac death at an age < 40 years and/or an inherited cardiac condition, new or unexplained breathlessness, heart murmur, absence of prodromal symptoms in any patient aged > 65 years.

The One Hospital ClinicalService Project is an integrated system composed by a network of International Hospital Departments, a clinical data repository and a shared environment for the collection, management, analysis and reporting of clinical and diagnostics data from patients treated by Medtronic therapies or patients wearing Medtronic implantable devices used within their intended use. The One Hospital ClinicalService is composed by a suite of systematic, data-guided activities designed to bring about immediate improvements in health delivery in particular settings. Data are prospectively collected. An independent committee of physicians prospectively identifies key clinical questions on a yearly basis for development of quality improvement activities, analyses and publications. A charter, approved by Hospital Istitutional Review Boards or other Hospital entities, assigns the ownership of data to the centers and governs the conduct of the project and the relationship of the scientific committee and Medtronic. Hospital is the data controller, while Medtronic is the data processor on behalf of the Hospital. Data collected for quality improvement purposes may be mined to perform clinical research.

We plan to study patient who faint in response to the sight of blood and compare them to healthy subjects who do not. We are going to use a special type of MRI scan (functional MRI) to determine if there are differences in brain activation in response to seeing bloody or gory pictures that occur before the fainting occurs.

Critical patients in emergency room are seriously situations that need quickly diagnosis and treatment. Different predictors of prognosis can be related with mortality and morbidity in-hospital and in long-term. In Brazil, this kind of registry is not available. The aim of the study is analysis and report data about critical patients in Emergency Departments over all country, showing demographic, clinical and prognosis data about that in Brazil.

Ventricular tachycardia is one of the commonest cause of sudden death in chronic chagas disease. As most ventricular tachycardias originate from scar in patients with heart disease, catheter ablation is an important step in patient treatment. Identification of fibrosis prior to ablation of sustained ventricular tachycardia (SVT) might reduce the time of anesthesia, procedure time, radiation exposure and possibly the risk of complications. Knowledge of arrhythmia circuit within scar allows planning strategies for each procedure. Condreanu et al. stablished that voltages inferior to 6.52 mV (unipolar) and 1.54mV (bipolar) are useful tools in detecting scar during electroanatomic mapping. Accuracy, however when compared to magnetic resonance imaging is limited due to difficulties in maintaining good contact between ablation catheter and ventricular wall. Contact force catheters might help increase accuracy of voltage mapping because they allow detection of poor contact areas. Although the threshold for identification of scar in ischemic and non ischemic patients during electroanatomical mapping is already known, this parameters still lacking for chronic chagasic individuals. A marked qualitative histological difference between these fibrous scars supports the hypothesis that voltage scar in chagasics might be different. Catheter ablation contact with endo and epicardial surface is an important issue when ablating arrhythmias. Conventional catheter ablation is not equipped with sensors capable of detecting degree of contact with the target. To our knowledge, the literature lacks information in regard to late lesions produced by a known contact force pressure "in vivo". The pattern of electrical activation in these patients and their relationship with local coronary veins for resynchronization likely to approach through the coronary sinus can be useful in defining chagasic that can benefit from resynchronization. Compare endocardial and epicardial impedance and voltage using CARTO 3 with fibrosis on 3T MRI Correlate areas of late activation within scar during activating mapping in sinus rhythm with different signal intensity in 3T MRI Evaluate the influence of contact pressure during application of radiofrequency in making fibrosis analyzed 30 days after the procedure using a 3T MRI. Assess the site of latest left ventricular activation in sinus rhythm and correlate with the coronary veins location