Active clinical trials for "Heart Failure"

Summary Rationale: Cardiac resynchronisation therapy (CRT) with biventricular pacemakers and implantable cardiac defibrillators (ICD) has proven to be a valuable therapy in selected patients with systolic heart failure, ameliorating both morbidity and mortality. However, with current selection criteria and implant technique, about 20 to 30 % of patients remain non-responders. Non-responders might be due to failing selection criteria or methodology in casu echocardiography. Moreover, the definition of response to CRT is unequivocal and there is a need for a simple and reproducible measure of response with low inter- and intra-observer variability. Primary objectives: This study evaluates the correlation between intrathoracic blood volume (ITBV) measured by contrast enhanced ultrasound (CEUS) and magnetic resonance imaging (MRI), as well as the feasibility to use intrathoracic blood volume as a predictor for response to CRT. Study design: a prospective nonrandomized pilot study Study population: patients with heart failure New York Heart Association (NYHA) class III or IV, a left ventricular ejection fraction equal to or less than 35% and a QRS-duration equal to or more than 0.12 seconds who are referred to our centre for implantation of a CRT-P or CRT-D device. Intervention: No specific intervention will be performed. Main study parameters: correlation between intrathoracic bloodvolume measured by CEUS and MRI, correlation between LVEF measured by CEUS and by standard 2D ultrasound (biplane methods of discs), change in intrathoracic blood volume as a response to CRT. Nature and extent of the burden and risks associated with participation, benefit and group relatedness: at baseline a clinical examination, laboratory analysis, cardiopulmonary exercise testing, echocardiography and cardiac magnetic resonance imaging will be performed. All of these examinations will be repeated at 3-months follow-up except for the cardiac magnetic resonance imaging. All examinations, except for the MRI, are part of the standard workup in our hospital for patients undergoing implantation of a CRT device. Data needed for the purpose of this study, will be acquired by offline image analysis with dedicated software.

The primary objective of this observational study is to determine the incidence of medically attended (inpatient or outpatient) acute respiratory illnesses or events leading to worsening cardiorespiratory status (ie, acute exacerbations of chronic obstructive pulmonary disease [AECOPD] or worsening CHF) associated with RSV infections in high-risk adults (ie, those with severe COPD and/or advanced CHF) across multiple consecutive RSV seasons.

The purpose of this study is to investigate: the relation of a set of (bio)markers and response to Cardiac Resynchronization Therapy (CRT); the interrelationship as well as the potential predictive power of these (bio)markers on improvement and/or deterioration of cardiac function, cardiac geometry (reverse re-modeling during CRT) will be evaluated. (Bio)markers include but are not limited to: collagen, genomic markers, molecular markers, electrocardiographic markers, echocardiographic markers, arrhythmogenic markers and markers for renal function: blood urea nitrogen (BUN), serum creatinine, glomerular filtration rate (GFR).

The primary objective is to evaluate the impact on heart failure related quality of life when integrating a mobile health system, Verizon Wireless's Converged Health Management (CHM), into a subject's self-management of their heart failure (HF) as well as in the medical management of HF by the subjects' clinical team.

Cardiovascular disease (CVD) is an important public health problem that affects millions of people worldwide. Associations between risk factors, such as smoking, dyslipidaemia or hypertension, and prevalent CVD are well documented. However, few studies have investigated associations with onset of disease. The initial manifestation of CVD, for example an episode of unstable angina, is important because it influences the prognosis, the quality of life and the management of disease. Furthermore, the extent to which social deprivation, alcohol consumption or atrial fibrillation affects presentation of CVD is poorly understood and deserves further consideration. Most previous studies have considered CVD as a single entity. However, differences in aetiology between coronary phenotypes suggest that risk factors may not be shared across specific coronary phenotypes and their relative importance is likely to differ for each phenotype. Gaining knowledge of these differences could provide insights into the pathophysiology of specific forms of CVD and could eventually lead to modification of recommendations for patient management and disease prevention. We propose to use the linkage of the national registry of coronary events to general practice records in the Clinical Practice Research Database (CPRD), to investigate whether demographic, behavioral, and clinico-metabolic risk factors differentially influence the onset of specific types of CVD.

To observe and document ventilation parameters in the advanced heart failure population, through the course of illness, which often includes cardiac resynchronization therapy (CRT), left ventricular assist device (LVAD), and transplant. Findings from this cohort are anticipated to be of sufficient interest to the scientific community to merit publication and are likely to provide preliminary data for future hypothesis generation and subsequent prospective, randomized controlled trials. A compact, inexpensive apparatus has recently become commercially available for performing sub-maximal exercise testing (SHAPE Medical, St Paul, MN), including gas exchange analysis and will be used in this study. This apparatus is not investigational.

The purpose of this study is to evaluate the ability of a non-invasive monitor that measures how much fluid is in the body as well as various blood tests for their ability to predict worsening kidney function in patients with heart failure.

Assessment of sensor parameter in patients with heart failure.

This is an observational study to learn which patients benefit from CRT therapy and to track the clinical changes that help identify the risk-level of CRT patients.

The purpose of this study is to determine whether treatment with candesartan cilexetil for at least 6 months in patients with chronic heart failure improves clinical signs and symptoms of chronic heart failure.