View clinical trials related to Sudden Cardiac Death.
Filter by:Patients with diabetes have an increased risk of sudden cardiac death compared to the general population. Severe hypoglycemia is associated with an increased risk of cardiovascular (CV) disease (CVD) and events, including cardiac arrhythmias and sudden cardiac death; likewise, increased glycemic variability is associated with macrovascular complications and increased mortality. The physiological mechanisms linking hypoglycemia and glycemic variability to CVD and CV events remain unclear. Myocardial work and mechanical dyssynchrony will be measured by speckle tracking echocardiography during euglycemia, hypoglycemia and hyperglycemia in individuals with type 1 diabetes, type 2 diabetes, and without diabetes. Echocardiographic images from three experimental clamp studies - Hypo-Heart 1 (sub-study 1), Hypo-Heart 2 (sub-study 2) and Rapid-Heart - will be included in this study.
Arrhythmogenic Cardiomyopathy (ACM) is increasingly identified as an important cause of cardiac morbidity and mortality, especially of SCD, in a younger population. Although there are no epidemiological data available, the investigators' experience is that in the North Indian region, ACM is rare outside our regions. ACM is also an understudied cardiac disorder in the South-Asian region. An ethnic nonmigratory population inhabits the two regions, and consanguineous marriages are common. Based on these observations, the investigators firmly believe that there may be a founder gene in our populations responsible for the increased incidence of ACM. Our project includes a thorough phenotypic analysis ((ECG, Holter, and echocardiography) in the ACM patients and their first-degree relatives; cardiac MRI and high resolution endocardial bipolar and unipolar voltage mapping (using HD grid catheter) in the patients. The patient provided blood for the extraction of DNA will first undergo target panel sequencing for 20 known classic right-dominant ACM and left-dominant ACM. If this is negative for known pathogenic and likely pathogenic variants but identified novel variants of uncertain significance (VUS), then co-segregation analysis in family members will be performed. This technique can provide helpful information to reclassify VUSs. If both these are negative, then whole-exome 'trio' analysis will be performed, whch includes the proband and two family members, to triangulate from all 20,000 genes to a list of candidates for further interrogation. The investigators wish to provide comprehensive answers to the research question by combining the genetic analysis with phenotypic evaluation.
The epidemiology of myocarditis is largely unknown and based mainly on small single-center studies. The study aim to evaluate the current incidence, clinical characteristics and outcomes of patients hospitalized due to myocarditis in a general population.
This is a retrospective cohort study of pediatric hypertrophic cardiomyopathy (HCM) patients using chart and registry review methodology. The studies objective is to develop and validate a sudden cardiac death (SCD) risk calculator that is age-appropriate for children with HCM that includes clinical and genetic factors.
Patients receiving dialysis for kidney failure suffer from very high rates of sudden cardiac death due to abnormal heart rhythms and perfusion defects associated with HD treatment. It has previously been recognized that patients suffer heart injury during the dialysis procedure which may be an important factor for investigation. The study uses a simple implantable device that can monitor heart rhythms over time to gather information on the type of abnormal rhythms that occur in dialysis patients. This information will be combined with ultrasound and x-ray scans of the heart that will also be collected. The goal is to understand the relationship between the abnormal rhythms and injury to the heart during dialysis and what causes these injuries. The information gathered in this study will be used to compare the accuracy of an in house personalized computational model to predict potential cardiac injuries when patients undergo HD 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.
The investigators have created a way of quickly collecting information in a large scale young population regarding the presence of some severity indicators that may allow us to classify them into: seemingly "low risk" and possible "elevated risk" for the presence of heart disease. It would have to be a short questionnaire, in order to receive a great adherence but that could simultaneously provide precise information, with an adequate description of symptoms and warning signs, in a way that a triage in the young adult population could be performed in the general young adult population in order to select individuals with an indication for personalized clinical evaluation and possible need of complementary diagnostic means. Based on this premise the investigators have developed a fast-response questionnaire named the Sudden Cardiac Death Screening Of risk factorS (SCD-SOS). This questionnaire has already been tested in a population of approximately 1500 young adults, and some changes have been introduced in order to refine its performance. To best of the investigators knowledge, there are no large scale European surveys estimating the prevalence of cardiac disease and associated clinical symptoms in a non-selected (non-athlete) population of this age group. Purpose: To screen a young adult population from central regional of Portugal for heart disease possibly associated to a high risk of Sudden Cardiac Death (SCD). To determine the national prevalence of clinical symptoms of heart disease and of heart disease with increased risk for SCD in this age group. To detect young adults in risk of SCD and with an indication for evaluation by a cardiologist, and possible need of: - medical treatment - electrophysiologic (EP) study and percutaneous ablation - an implantable cardiovertor defibrillator - a pacemaker - other type of specialized cardiac intervention
The purpose of this study is to evaluate the use of non-invasive markers of the autonomic function and micro- and macrocirculation to predict mortality and cardiovascular end points in end-stage renal disease patients. Furthermore we aim at getting new insight into the insufficiently understood pathophysiology leading to excessively high cardiovascular and non-cardiovascular mortality in dialysis patients.
This is a prospective, multi-center cohort study of patients with a history of coronary artery disease (CAD) and documentation of either a prior myocardial infarction (MI) or mild to moderate left ventricular dysfunction (LVEF 35-50%). The primary objective of this study is to determine whether biologic markers and ECGs can be utilized to advance SCD risk prediction in patients with CHD and LVEF>30-35%. The overarching goal of the study is to identify a series of markers that alone or in combination specifically predict risk of arrhythmic death as compared to other causes of mortality among this at risk population of coronary heart disease (CHD) patients with preserved left ventricular ejection fraction (LVEF> 30-35%). If biologic or ECG markers are identified that can specifically predict risk of ventricular arrhythmias, then these markers may serve as relatively inexpensive methods to identify those at risk. The public health impact of identifying markers could be quite substantial, leading to more efficient utilization of ICDs and advances in our understanding of mechanisms underlying SCD.
The purpose of this study is to determine how well the device predicts susceptability to potentially lethal ventricular arrhythmias.