Active clinical trials for "Heart Failure"

A comparison of pulse wave characteristics, as measured by peripheral tonometry, in pre and post Left Ventricular Assist Device (LVAD) patients.

Historically, transthoracic Doppler echocardiography has been unable to provide interpretable data of blood flow within the lung parenchyma because of air attenuation of Doppler signals. Recently, a transthoracic Doppler system known as the Sonara/tek Transcranial Doppler (TCD) System has been developed that can identify parenchymal pulmonary blood flow (PPBF) signals. The ability to non-invasively collect information regarding the pulmonary aspect of the cardio-pulmonary system may provide valuable information and new insights into the structural and functional characteristics of the lung parenchyma and vasculature in health and disease states.

The purpose of this study is to determine the predictive factors of poor compliance to sleep disordered breathing therapy in chronic heart failure patients treated for central sleep apnea. To characterize nocturia pathophysiology associated with SDB in this population. To use telemonitoring data to define predictive factors of poor compliance.

The purpose of this trial is to determine if implantable cardiac device leads implanted in the His bundle are capable of detecting ventricular arrhythmias.

This study is proposed to determined a national database of the etiologies, clinical and the demographic profile, using diagnostic tests and treatment of outpatients with chronic heart failure in Azerbaijan population.

The purpose of this study is to assess whether baseline sympathetic innervation in patients with chronic heart failure (CHF) is predictive for response to cardiac resynchronization therapy (CRT). And to assess whether response to CRT coincides with restoration of regional sympathetic innervation.

This proposal is designed to test the hypothesis that humans shift to reliance on ketone bodies as a cardiac fuel source during the development of HF. The investigator also propose that this shift to ketone utilization can be detected by metabolomic profiling of blood. Specific Aim 1: To determine if the failing human heart exhibits increased extraction of blood-borne ketone bodies. Ketone bodies will be measured in coronary sinus, arterial, and central venous blood samples to determine AV differences. The HF group will be comprised of patients undergoing cardiac resynchronization therapy with an implantable cardioverter-defibrillator. The Control group will be compromised of patients without evidence of structural heart disease who are undergoing catheter ablation for supraventricular tachycardia. Specific Aim 2: To determine whether blood samples from humans with HF display metabolomic signatures indicative of increased myocardial ketone body utilization. Quantitative targeted metabolomics will be performed on the samples described in Aim 1 to determine if metabolite markers (e.g. C4-OH acylcarnitine, acetylcarnitine, succinate) found to be associated with increased myocardial ketone body oxidation in animal models are increased in the human HF group compared to the controls.

In 50 Patients who are undergoing a planned surgical procedure which require a central venous catheter the diameter of the subclavian vein is measured by ultrasound under 6 different conditions.

To compare heart function, symptoms, exercise capacity and quality of life in patients with Congestive Heart Failure (CHF) and Atrial Fibrillation (AF)before and after catheter ablation. Hypothesis: Restoration and maintenance of sinus rhythm by catheter ablation, without the use of antiarrhythmic drugs, in AF and CHF improves heart failure status.

Nottingham Primary Care Trust has launched telemonitoring to support: independent living and self-management ability of people with congestive heart failure (CHF), chronic obstructive pulmonary disease (COPD) and co-morbidities; and reduce the health care utilisation associated with these patients, including the number of hospitalisations, GP visits and community matron and specialist community nurse home visits. The Multidisciplinary Assessment of Technology Centre for Healthcare (MATCH) will evaluate the technology and its impact of this telemonitoring system on quality of care (i.e. process measures), patient outcomes and direct healthcare costs from an NHS perspective.