Active clinical trials for "Arrhythmias, Cardiac"

The purpose of this investigation is to determine the prevalence of device-recorded ST segment changes occurring before appropriate Implantable Cardiac Defibrillator (ICD) therapies (ATP or Shock) and to define their temporal relationship to ventricular arrhythmias.

The purpose of this study is to use the Squid magnetometer (Superconducting QUantum Interference Device) to help diagnose electrical and mechanical abnormalities of the stomach and intestines.

This study is to assess if subjects receiving a clinically indicated implanted cardiac pacemaker or defibrillator can be safely discharge home the same day of the procedure.

Arrhythmias of the atria of the heart are a common comorbidity in patients with cardiac rhythm management devices, such as pacemakers and implantable cardioverter/defibrillators (ICD). External electrical cardioversion is an established method to achieve rhythm control (restore normal sinus rhythm) in patients with atrial arrhythmia. Little data on safety and efficacy of external electrical cardioversion in patients with cardiac rhythm management devices exists. Thus, available data on the safety of external electrical cardioversion in cardiac rhythm management patients lacks statistical power to accurately reflect the true hazard of external electrical cardioversion in patients with cardiac rhythm management devices. The aim is to systematically include and follow all patients with cardiac rhythm management devices presenting for external electrical cardioversion, to analyse the effects of external electrical cardioversion on leads and devices.

The proposed clinical study aims to validate the diagnostic performance, compared to a reference ECG, of the electrocardiographic function of the BPM Core developed by Withings for the automatic identification of atrial fibrillation (AF).

The overall aim of this study is to improve our understanding of the effects of the build-up of amyloid deposits in the heart, in particular, our understanding of the risk of abnormal heart beats, or rhythms, associated with people with cardiac (heart) amyloidosis. Symptoms such as palpitations (fast, strong or irregular heart beat) and blackouts are common in people with cardiac amyloidosis, but there is not enough information on what causes this. At present, there is also not enough information on when they occur, how often they happen, and which patients are at risk of having serious, life-threatening types of abnormal heart rhythms. Some of these abnormal heart rhythms can be treated with medicine; others need electronic devices (e.g. pacemakers) implanted or inserted in the heart to prevent serious harm. The information on when is the best time to implant these life-saving devices remains limited. In this study, a small device known as an implantable loop recorder (ILR) will be implanted under the skin on the chest wall to continuously monitor participants' heart rhythm. This will help us answer some of the questions about what causes the abnormal heart rhythms, when they happen, and which patients are particularly likely to have them. Furthermore, it may help us to identify earlier, rather than later, those who are at risk of developing abnormal heart rhythms. This may lead to improvements in the care of people with cardiac amyloidosis in the future. Participants may not directly benefit from taking part in this study; however, there is a chance that the ILR may reveal heart rhythm abnormalities in some participants which might not be picked up otherwise, and so may lead to a change in their treatment.

The association between alcohol consumption and cardiovascular disease (CVD) has mostly been examined using broad endpoints or cause-specific mortality. The purpose of our study is to compare the effect of alcohol consumption in the aetiology of a range of cardiovascular disease phenotypes.

Studies have shown that the risk of developing heart arrhythmias, is increased in patients receiving medication for Attention-deficit hyperactivity disorder (ADHD) and depression. The QT-interval on a electrocardiogram (ECG) is often used to assess the patients risk of developing heart arrhythmias. The QT-interval defines the hearts electrical resting period and a long interval is linked to an increased risk of developing heart arrhythmias. In this project the investigators wish to examine possible side-effects in patients receiving medication for ADHD and depression and their dynamic QT-interval changes, by analysing the ECG changes that occur during "Brisk Standing".

Organized ventricular arrhythmias (ventricular tachycardia (VT), torsades de pointes (TdP) and ventricular fibrillation (VF)) represent a major event in the clinical history of a patient and they can lead to hemodynamic instability and sudden cardiac death (SCD). Recurrences of ventricular arrhythmias and electrical instability have exponentially increased in the last decades and a new clinical entity called "electrical storm" (ES) has emerged as major morbidity and mortality factor. The ES is defined as a cluster of 3 or more sustained ventricular arrhythmias within 24 hours, or a sustained ventricular tachycardia lasting 12 hours or more and that does not respond to treatments. Most of the patients presenting ES are already implanted with an ICD. This is due to 3 factors: first, patients with ICD implant are at higher risk to develop ventricular arrhythmias for the cardiac disease that led to the ICD implant. Second, the device records and treats also asymptomatic or poor symptomatic arrhythmic episodes that otherwise would not be detected. Third, and more important, the device gives the possibility to survive to an arrhythmic episode, making it possible for the patient to experience an ES. The incidence of ES is debated in different studies and ranges from 10 to 60% in patients with ICD for secondary prevention and from 4 to 7% in patients with ICD for primary prevention. The aim of the ELECTRA registry is twofold: To create an international registry on clinical features, optimal therapy, ablation strategy, prognosis and the effect of ICD programming on patients with ES. To use the data derived from the registry for a prospective, observational study on mortality and rehospitalization rate in patients with ES.

The use of vasopressor supplement materials to local anesthetics is commonly used in procedures in various fields of dentistry, ENT (ear, nose, and throat), Plastic Surgery, Hand surgery and gastroenterology. Epinephrine is used to constrict small blood vessels, thus reducing bleeding during a medical procedure, reducing the toxicity by reducing systemic absorption of local anesthetic, and prolonging the duration and intensity of neural blockage created by the local anesthetic. There are descriptions in the literature of cases in which the use of lidocain and adrenaline caused adverse cardiac events such as arrhythmias, edema and increase in blood pressure during ENT and dentistry procedures. As far as we know there has never been a systematic examination of the incidence and severity of arrhythmias during procedures with local anesthesia. The purpose of the study: To examine the prevalence and types of arrhythmias in patients undergoing a medical procedure performed under local anesthesia Examine whether adding adrenaline to the local anesthetics affects the incidence of arrhythmia Determining the prevalence and types of arrhythmia will help determine the need for monitoring and type of monitoring required during procedures under local anesthesia. The patients: 500 patients undergoing surgery or a medical procedure in which a local anesthetic is used at Meir Hospital. Patients with a medical history of known cardiac arrhythmia will not be included. Methods: Patients will undergo the medical procedure prescribed for them, using local anesthesia with or without adrenaline, at the discretion of the surgeon, in accordance with the usual routine being applied nowadays. The amount and type of anesthesia used will be registered. In addition to the routine monitoring that is currently performed (blood pressure cuff and non-invasive blood oxygen saturation) a continuous ECG monitoring device will be connected prior to the beginning of the surgical procedure, until the patient is discharged from the recovery room. The ECG monitoring results will be analyzed to detect arrhythmia. Side effects being reported by patients (palpitations, dizziness, fainting, CPR {cardiopulmonary resuscitation} ) will be recorded. In cases that an arrhythmia is detected, the type of arrhythmia and the presence of clinical symptoms will be investigated.