View clinical trials related to Heart Diseases.
Filter by:Mechanisms that typically result in increased cardiac output, such as inotropic support, increased heart rate, and decreased afterload, have a blunted effect in Fontan circulation. The "thoracic pump" is a contributor to venous return that has been largely unexplored in patients with Fontan physiology. Inspiratory muscle training can improve the performance of competitive athletes across a range of sports and can improve quality of life and functional capacity in heart failure patients, presumably by reducing inspiratory muscle fatigue and possibly by improving peripheral blood flow during exercise. One could surmise that the effects of these changes would be particularly important in the Fontan population. The investigators propose to study the effects of inspiratory muscle training on exercise and pulmonary function parameters in a cohort of adult Fontan patients. The investigators hypothesize that a 12-week program of inspiratory muscle training with an inspiratory impedance threshold device will improve inspiratory muscle strength and endurance, and that this will translate into improved exercise performance in patients with Fontan physiology.
Hypothesis: By blocking aldosterone signaling in patients with Tetralogy of Fallot, Transposition of the great vessels with a prior atrial switch, and single ventricle "Fontan" patients, incident heart failure will be delayed, symptoms of heart failure ameliorated, and risk of arrhythmias decreased through decreases in myocardial fibrosis. Half of enrolled patients will complete an SF-36 quality of life questionnaire, perform a 6 minute walk, and have blood drawn for biomarker analysis at enrollment, again after 3 months without therapy, after 6 months on therapy, then finally after 12 months of eplerenone therapy. Half of enrolled patients will have the 3 month drug free period at the end of 12 months on therapy. Patients will be randomly assigned to drug free period up front versus at the conclusion of the trial period. Eplerenone will be started at a dose of 25mg and titrated up to 50mg at 4 weeks if tolerated. Blood will be drawn for basic metabolic panel analysis at enrollment, 3 months, 4 months to allow for dose titration, and at 6 and 12 months for monitoring.
The purpose of this study is to evaluate the prevalence, during the enrolment, of Left Ventricular Dysfunction diastolic and/or systolic in patients with diabetes mellitus type 2 without known or documented heart disease history and recognize its predictive clinical, biohumoral and with non-invasive techniques parameters.
Acute kidney injury (AKI) occurs in 40% of children following heart surgery. Serum creatinine (Scr) is a late biomarker of AKI, rising 24-48 hours after surgery. Thus, for medicines excreted in the urine, AKI could potentially lead to toxic levels in the blood. Urinary biomarkers have the ability to detect AKI earlier. Whether early detection of AKI through urinary biomarkers can predict altered drug levels is unknown. Milrinone is used to improve heart function after surgery, but accumulates in AKI resulting in low blood pressure. Dose adjustments are not currently possible because of the late rise in SCr, and are based on clinical parameters that may lead to clinically relevant over or under-dosing. Thus, this study will address an important knowledge gap being the first to use elevations of AKI biomarker concentrations to anticipate increased milrinone levels.
The outcome of this research will be a demonstration that family health history (FHH) risk data can be used efficiently to deliver more effective healthcare in geographically and ethnically diverse clinical care environments. Although FHH is a standard component of the medical interview its widespread adoption is hindered by three major barriers: (1) a dearth of standard collection methods; (2) the absence of health care provider access to complete FHH information; and (3) the need for clinical guidance for the interpretation and use of FHH. In addition, the time constraints of the busy provider and poor integration of FHH with paper medical records or electronic medical records (EMR) impede its widespread use. The investigators hypothesize that patient-driven and electronic collection of FHH for risk stratification will promote more informed decision-making by patients and providers, and improves adherence to risk-stratified preventive care guidelines. The study team will use an implementation sciences approach to integrate an innovative FHH system that collects FHH from patients. Intermountain Healthcare will provide the information technology expertise with EMR design to develop an innovative solution to a storage model standard for FHH data as well as a centralized standards-compliant open clinical decision support (OpenCDS) rule development architecture to analyze FHH and to generate evidence-based, individualized, disease risk, preventive care recommendations for both patients and providers.
Recent advances in genomic techniques are making possible a new wave of genetic discovery in congenital heart disease (CHD). Existing data suggests that CHD occur in Sub-Saharan Africa at frequencies similar to the rest of the world. In this application, we propose to utilize the unique advantages of Sub-Saharan Africa - a combination of the most genetically diverse populations in the world and of diminished environmental background effects (i.e. low prevalence of smoking, alcohol abuse, obesity in comparison to western countries) - to better understand the genetic basis for congenital heart disease. We will couple next generation genomic techniques with more traditional gene discovery methods to investigate CHD in two African countries: Uganda and Nigeria. The inclusion of syndromic and non-syndromic CHD observed in these populations as well as careful phenotyping (including echocardiography) will greatly enhance our potential to provide insight into the genetic architecture of CHD in African populations. To accomplish this, we plan to enroll families, in whom members have congenital heart malformations consistent with an error of early human development in our research protocol. Patients will be enrolled at the Uganda Heart Institute in Kampala, Uganda, and at the Department of Pediatrics, College of Medicine, University of Lagos, Nigeria, with the potential to include other African sites. High throughput genomic studies will be done at the NIH.
The aim of this study is evaluate the clinical, hemodynamic and electrocardiographic responses during an inspiratory muscle training session during a single cardiopulmonary rehabilitation session program. An electrocardiogram will be continuously recorded and the heart rate (HR) and blood pressure (BP) will be evaluated before, during and immediately after a single inspiratory muscle training (IMT) session, consisting of two series of 15 cycles, with one-minute intervals between sets and an initial load of at least 30% of the initial maximal inspiratory pressure (MIP).
Cardiovascular complications account for the highest mortality in type 2 diabetic patients, mainly due to ischeamia heart disease (IHD). Most of the attention in treating IHD in type 2 diabetes is understandably directed toward treating coronary artery conditions. However there are other treatable culprits in these patients. Left ventricular hypertrophy (LVH) is widespread in type 2 diabetic patients with IHD, even in the absence of hypertension. It is a strong predictor of cardiovascular events and all-cause mortality. In one study, the presence of LVH was a stronger predictor of mortality than either multivessel coronary disease or impaired left ventricular function. Regression of LVH has been associated with an improved prognosis, independent of change in blood pressure (BP). Therefore, cardiovascular events and mortality in type 2 diabetes with IHD might will be reduced if we can find novel therapies to regress LVH. Pioglitazone can improve atherosclerosis. Therefore, we hypothesied that pioglitazone can regress the left ventricular mass (LVM) in type 2 diabetes with IHD.Therefore, in this study, we will treat patients with pioglitazone, and we will also metformin as control.
Study of heterogeneity in associations between heart rate and the initial presentation of 12 cardiovascular diseases.
The purpose of this study is to study whether percutaneous chronic total occlusion (CTO) revascularization, by the use of Percutaneous Coronary Intervention (PCI), stenting, guidewire, and catheter, improves a patient's quality of life and their left ventricular function, reduces angina severity, and improves long-term survival.