View clinical trials related to Ventricular Fibrillation.
Filter by:This registry is designed to gather further evidence, in addition to the SD01 Master Study, for the safety and efficacy of the SD01 ICD lead.
Rationale: Sudden cardiac death, mainly caused by ventricular arrhythmias (VA), is a major cause of morbidity and mortality in non-ischemic cardiomyopathy (NICM). Therapies that effectively prevent VA are lacking. Improved understanding of the substrate and mechanisms of VA in NICM may allow more effective, individualized and substrate-based therapies to be developed. In addition, risk stratification in NICM needs to be improved so that therapies can be allocated more efficiently. Objectives: 1) To improve our understanding of the underlying pro-arrhythmic substrate and electrophysiologic mechanisms of VA in NICM, and to develop individualized treatment for VA based on the identified substrate. 2) To improve risk stratification for VA and sudden cardiac death in NICM based on substrate characteristics. 3) to evaluate disease progression in NICM. Hypothesis: Improved understanding of the substrate and mechanisms of VA in NICM may allow more effective, individualized and substrate-based therapies to be developed. Study design: A prospective cohort study. Study population: The study population will consist of three groups (A, B and C): NICM patients with documented VA, suspected VA or intermediate to high risk for VA (according to established criteria) who are not referred for cardiac surgery (group A), NICM patients with documented VA, suspected VA or a high risk for VA who are referred for cardiac surgery (group B) and a control group consisting of patients without NICM who are referred for cardiac surgery (group C). Evaluation: All patients will be evaluated according to current standards for patients with NICM. Evaluation will include 24h-Holter, echocardiography, coronary angiogram and contrast-enhanced MRI (CE-MRI). If CE-MRI is performed in another hospital, additional recordings will be performed in our hospital. Additionally, blood samples (arterial, cardiac venous and peripheral venous) for collagen turnover markers will be taken from all patients. 123-iodine metaiodobenzylguanidine (123-I MIBG) imaging, electrophysiologic study and endomyocardial biopsy will be performed in group A and B. Intra-operative biopsy will be performed in group B and C. Intervention: In group B, intra-operative mapping and cryo-ablation and postoperative electrophysiologic study will be performed in patients with subepicardial late enhancement on MRI or induced VA suspected for an subepicardial origin. Main study parameters/endpoints: The main study parameters are extent, location and pattern of fibrosis on imaging and in biopsy specimens. The main study endpoints are inducibility of VA, type of induced VA, spontaneous VA and type of spontaneous VA.
The purpose of this study is to determine whether levels of inflammatory markers in circulating blood can correlate with risk for dangerous heart rhythms. Patients with systolic heart failure, which has been shown to increase risk for dangerous heart rhythms, will be enrolled. All subjects will have an implantable cardioverter-defibrillator (ICD) in place, which allows regular evaluation of heart rhythm.
The objective of this study is to gather data to establish the chronic safety, performance and effectiveness of the RELIANCE 4-FRONT™ Passive Fixation Defibrillation Leads.
The study is designed to confirm safety and efficacy of the SD01 ICD (implantable cardioverter-defibrillator) lead.
Recognition of out of hospital cardiac arrest (OHCA) during an emergency call is based on standardized questions concerning the symptoms of OHCA. With this method cardiac arrest is recognized in 50-83% of cases. When the emergency medical dispatcher identifies cardiac arrest during the emergency call the survival of the patient improves. Accurate emergency medical service response is activated promptly and bystander will receive cardiopulmonary resuscitation (CPR) instructions. It has been estimated that proper implementation of CPR instructions will save thousands of lives each year. If the ECG could be recorded by the mobile phone, transmitted during the emergency call to the dispatch centre and analysed there with the software of a semi-automated external defibrillator(AED), the recognition of cardiac arrest could be more accurate. The aim of this study is to examine, if AED, with minimal size electrodes within an area of a mobile phone, is able to recognize reliably ventricular fibrillation (VF), the rhythm with the best prognosis in OHCA.
The primary hypothesis is that an ICD shock may be predicted days in advance by a combined score derived from different data obtainable from the ICD
The purpose of the study is to proof the safety and efficacy of the new ICD sytem (Iforia/Ilesto). The devices are available with DF-1 and DF4 connection. A special focus is set on the ICD system with DF4 connection.
Death from cardiac disease is one of the most common causes of death in the western world. The majority of these deaths takes place outside hospital as sudden cardiac death. However, with immediate (within minutes) actions such as cardiopulmonary resuscitation (CPR) and defibrillation many lives would be saved. CPR is a key factor to increase survival from Out of Hospital Cardiac Arrest (OHCA). CPR buys time by supporting the brain with some circulation in waiting for a defibrillator that can restart the heart. In Sweden about 2,5 million people are trained in CPR. However, only about half of all OHCA victims will get CPR in waiting for ambulance arrival. The aims of the Response to Urgent Mobile message for Bystander Activation (RUMBA) trial is to try a new way of logistics to increase bystander CPR by recruiting lay volunteers to nearby OHCAs via their mobile phones. Hypothesis: By dispatching lay volunteers to nearby OHCAs with mobile phone technology bystander CPR may increase from 50% to 62,5 %
In this study, we are comparing the difference in outcomes between patients who were given shocks to the heart, during the upstroke of cardiopulmonary resuscitation (CPR) and before CPR is started. The study population will be all cardiac arrest patients attended by the staff of the Emergency Department who fulfil the eligibility criteria. Patients will be managed according to currently approved cardiac arrest protocols. Patients confirmed in cardiac arrest have manual chest compressions started while mechanical CPR (whereby chest compressions are delivered by an automated device) is prepared. Mechanical CPR should be started as soon as possible (<1 minute). If patients are eligible to be shocked, they will receive shocks either during upstroke of CPR or before CPR is started. Thus the purpose of this study is to answer the question whether are there improvement in survival between when shocks are given during upstroke and before CPR is started.