View clinical trials related to Death, Sudden, Cardiac.
Filter by:This study will assess the impact of higher rate cutoffs and longer delays than standard programming on inappropriate therapy in primary prevention ICD and CRT-D patients.
Background: The impact of the known non-invasive cardiac indices for identification of hemodialysis (HD) patients at high-risk for sudden cardiac death (SCD) has not been evaluated. Patients: Fifty-nine HD patients were randomized into 2 groups. Thirty of them (group A-aged 54.6±8.9 years) participated in a supervised training program with stationary bicycles during their HD sessions (3/weekly) for 10 months, while the rest (group B-aged 53.2±6.1 years) remained untrained and were used as controls. Study hypothesis: Exercise training will affect most of the non-invasive cardiac markers of SCD and the total score positively. Method: At entry, as well as at the end of the study all subjects underwent a cardiopulmonary exercise testing (estimation of aerobic capacity-VO2peak), an echocardiographic study (LV ejection fraction -LVEF evaluation), an ambulatory 24-hour Holter monitoring for cardiac autonomic nervous system activity evaluation by time- and frequency- domain heart rate variability (HRV) calculation (measurement of SDNN, mean RR and low to high frequency ratio-LF/HF), a signal-averaged ECG (late potentials-LP documentation) and a submaximal exercise test for microvolt-T-wave alternans (TWA) detection.
The purpose of this study is to characterize the chronic performance of the St. Jude Medical SJ4 connector and RV high voltage SJ4 leads.
The purpose of the study is to determine the myocardial function and vascular adaptation after strenuous exercise in association with consumption of polyphenols. The investigators aim to investigate the effects of extreme endurance exercise on the inflammatory system. Furthermore, the role of the cardiovascular response and adaptive mechanisms of the vasculature are examined. Subclinical injuries to the myocardium and vascular wall are being investigated.
Prophylactic implant of an ICD (implantable cardioverter defibrillator) for prevention of sudden cardiac death from a life-threatening heart rhythm abnormality is a standard recommendation for patients with ejection fractions (EFs) of 35% or less. The main purpose of the trial is to determine why patients who are receiving care at a community-based cardiology program and are known to have a low ejection fraction (EF) measurement of 35% or less per echocardiogram and/or cardiac nuclear scan testing are not being approached for ICD (implantable cardioverter defibrillator) implant. Additionally, other secondary purposes of the trial are: 1) to determine if these patients are or are not receiving recommendation from their provider to undergo prophylactic ICD implant 2) identify the reasons providers are not recommending ICD implant for their patients with reduced EFs 3) determine reasons patients recommended for ICD implant by their provider elect not to have the implant.
The purpose of this retrospective observational study is to obtain information to confirm or contradict the results of prior studies on domperidone and sudden cardiac death. The population studied are the Saskatchewan residents who used domperidone or another type of medication known as a Proton Pump Inhibitor (PPI) between 1990 and 2005. Information will be collected from various sources including the Saskatchewan Health (SH) database and Cancer Registry.
The purpose of this study is to analyse transitions in cardiac rhythm and hemodynamic variables during resuscitation of patients with in-hospital cardiac arrest.
The investigators will examine whether an educational video increases patient knowledge about heart failure and the risk of sudden cardiac arrest and leads to greater satisfaction with information provided as compared to usual care. Additionally, the investigators will look at whether racial concordance (physician and patient being of the same race) improves satisfaction with the patient's treatment decision and disease knowledge. Our hypothesis is that a video in which participants are of the same race as the patient will provide better education and more satisfaction with the treatment decision and may lead to more patients choosing ICD therapy.
The purpose of this study is to determine whether waveforms of the intracardiac electrograms, acquired through an ICD, can be used: - to predict malignant ventricular arrhythmias, requiring appropriate ICD therapies, and - to predict progression of heart failure in patients with ICD.
The purpose of this study is to compare the defibrillation efficacy between the 50/50% tilt biphasic waveform and the Tuned biphasic waveform in a single coil active can configuration.