Active clinical trials for "Syncope"

The BioMonitor is an implantable cardiac monitor used to automatically detect and record episodes of arrhythmia in patients with bradycardia, tachycardia, asystole and atrial fibrillation. The study will be conducted to support regulatory approvals outside of Europe. This BioMonitor Master study is designed to investigate the clinical efficacy and safety of the BioMonitor.

Orthostatic intolerance refers to symptoms that occur with standing and improve or resolve with recumbency. Few studies have evaluated orthostatic intolerance symptoms by electroencephalography (EEG), and none of those studies have focused on the adolescent-aged patient. This study will compare EEG characteristics and sweat rate during head-upright tilt (HUT) testing among patients with postural tachycardia syndrome (POTS) and patients with syncope without POTS. Patients with POTS will also undergo a separate HUT with abdominal and lower extremity compression. The primary aim of this study is to characterize video EEG changes that correspond with orthostatic intolerance in youth during HUT testing. The investigators hypothesize that the clinical encephalopathy related to POTS and referred to as 'brain fog' will have an electrographic correlate. Secondary aims include (1) EEG comparisons of POTS symptoms with and without abdominal and lower extremity compression during HUT, (2) correlation between sweat rate and EEG changes during HUT, and (3) analysis of EEG characteristics that distinguish syncope with POTS from syncope without POTS. The investigators hypothesize that POTS patients have prolonged syncopal prodromes (compared to syncope patients without POTS) which are protective of syncope during daily activities.

Study hypothesis: Dual-chamber pacemaker therapy with rate-hysteresis features is effective in preventing syncopal recurrences in patients affected by cardioinhibitory (CI) forms of reflex syncope diagnosed by means of carotid sinus massage, tilt table testing or implantable loop recorder (ILR). The outcome is measured either by the time to first syncopal recurrence or the total syncope burden.

The purpose of this study is to assess efficacy of prolonged Full Disclosure electrocardiogram (ECG) monitoring and signal analysis using advanced telemetric technology to diagnose syncope in comparison with standard diagnostic procedure

The objective of the study is to confirm safety and efficacy of the BioMonitor 2. The data is collected to support the regulatory approval of this product in countries outside the CE region.

The investigators compared the feasibility of serum creatine kinase and serum lactate concentration as diagnostic markers to distinguish between generalized tonic-clonic seizures (GTCS) and syncopes in clinical settings that require fast-action treatment, such as in the emergency departments.

Syncope (commonly called collapses or blackouts) is defined as loss of consciousness which is transient, self limiting and usually leads to falling. While the causes of syncope encompass a wide variety of factors, those due to heart rhythm abnormalities are acknowledged to be significantly more serious compared with other causes. The main aim of the study is to see if it is possible to find the cause of a patient's syncope faster using a device called an implantable loop recorder (ILR), which is implanted under the skin, versus conventional management. The device is slightly larger than a 50 pence coin and records the rhythm of the heart continuously. Although ILRs are being used widely today, we want to use a new model that is able to relay information to the doctor via wireless technology and internet. We also want to use ILRs earlier in diagnosing syncope, thereby avoiding unnecessary and lengthy hospital admissions and lowering cost. Primary aim: To see how soon the ILR detects abnormal heart rhythms or normal ones (in study subjects who faint/ suffer syncope). Secondary aims are: To see how soon treatment is started once the abnormal rhythm is detected by the ILR. To see which group (patients with ILRs or those receiving conventional tests) receives treatment sooner. To see which group has less subsequent collapses i.e has benefited from appropriate treatment sooner. To assess the cost effectiveness of using the implantable loop recorder more as a diagnostic tool for syncope versus conventional management (it should save many hospital admissions).

The purpose of the study is to determine physical and mental health issues of U.K. embryologists related to their occupational characteristics, and how workplace fatigue and burnout may affect their quality of life, cynicism, interactions with patients, attention to detail, and lead to human error, the cause of the most severe IVF incidents that often make headlines and result in costly litigation. It will also correlate how the current manual workflows contribute to these health issues, and what measures can be taken to improve both working conditions and embryologists' health, and, therefore, improve patient care.

Dysautonomia, primarily defined as postural orthostatic tachycardia syndrome (POTS) can seriously disrupt a child's daily activities. It is most commonly associated with nausea or abdominal pain. In preliminary studies, when orthostatic intolerance was treated with fludrocortisone, a standard therapy for orthostatic intolerance (OI), symptomatic improvement in nausea was observed. However, children with POTS were also observed to have higher supine mean arterial pressure (MAP) (preliminary data) and greater suppression of the baroreceptor reflex sensitivity (BRS) occurred upon up-right tilt. While fludrocortisone alleviates nausea associated with OI, its long-term use may pose long term health risks to children including worsening hypertension. Therefore, it is the objective of this study to define the mechanism for OI as it relates to nausea. The investigators hypothesize that OI resulting from changes in the autonomic nervous system is the likely mechanism for the nausea observed in the patients in this study. The investigators further hypothesize that this is potentially an early marker for future cardiovascular problems such as early onset hypertension and cardiac hypertrophy. The general objective of this protocol is to address this gap in knowledge by determining the autonomic characteristics of children with OI as well as defining neurohumoral profiles for these subjects to better understand the cause of the elevated supine in these subjects. By better understanding the potential mechanism for this condition, it is the investigators future goal to develop a more focused and safer treatment strategy. The investigators will study subjects between 10 to 18 years of age utilizing the tilt table to mimic daily life stressors and also measure serum levels of epinephrine, norepinephrine, rennin, angiotensin II, aldosterone, and vasopressin at baseline and during tilt. This study will generate data with high impact in that more rational treatments for management of dysautonomia could be chosen on the basis of the profile of dysautonomia and neurohumoral markers.

The purpose of the study is to evaluate the safety and performance of the Sleuth Monitoring system.