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Patients with heart failure cannot exercise as well as those who do not have heart failure, but the exercise dysfunction is not directly attributable to heart dysfunction. Rather, exercise is limited by problems with the skeletal muscles, the muscles in the arms and legs. In this study, the investigators are testing the hypothesis that high adrenaline levels lead to characteristic changes in skeletal muscles, and that interruption of these high adrenaline levels will lead to reversal of these muscle changes and improved exercise ability.
Allocation: Randomized, Control: Placebo Control, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Basic Science
clonidine, clinically indicated biventricular pacemaker
University of California, Los Angeles
Published on BioPortfolio: 2014-07-24T14:10:22-0400
1. Background - Pacemaker treatment gives asynchronous activation of the heart that often results in decreased heart function and clinical heart failure. New pacemaker types that...
100 pt multicentre study 50 pts randomised to triventricular pacemaker, 50 to biventricular pacemaker Feasibility study with 6 month outcome data
The primary reason the investigators are doing this study are to understand how the right side of the heart functions in heart failure patients with left ventricular assist devices (LVADs,...
The goal of X-Change HF is to estimate the effect of biventricular stimulation in patients who need antibradycardia ventricular stimulation (more than 80%); are eligible for the exchange o...
Patients who have heart failure and have electrical evidence of delay in the contraction of the left ventricle on an ECG tracing of the heart are eligible for biventricular pacing. Recent ...
Supra-clinical doses of clonidine appear beneficial in experimental sepsis, but there is limited understanding of the effects of clonidine at clinically relevant doses.
Heart failure or congestive heart failure remains a major public health concern on the global scale. End-stage heart failure is a severe disease where the heart is unable to pump enough oxygen and nut...
Long-term data on outcomes of participants hospitalized with heart failure (HF) from low and middle-income countries are limited.
The primary aim of the TRIAGE-HF trial was to correlate cardiac implantable electronic device-generated heart failure risk status (HFRS) with signs, symptoms, and patient behaviours classically associ...
Due to the declining instances of organ donation, total artificial heart (TAH) therapy is of increasing importance for the management of end-stage biventricular heart failure. We introduce the current...
A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.
The restoration of the sequential order of contraction and relaxation of the HEART ATRIA and HEART VENTRICLES by atrio-biventricular pacing.
Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.
An alpha-2 adrenergic agonist that crosses the blood-brain barrier. Clonidine acts centrally by reducing sympathetic tone, resulting in a fall in diastolic and systolic blood pressure and a reduction in heart rate. It also acts peripherally, and this peripheral activity may be responsible for the transient increase in blood pressure seen during rapid intravenous administration. (From Martindale, the Extra Pharmacopoeia, 30th ed, p350)
Heart failure caused by abnormal myocardial contraction during SYSTOLE leading to defective cardiac emptying.
Benign Prostatic Hyperplasia (BPH) Erectile Dysfunction Urology Urology is the branch of medicine concerned with the urinary tract and diseases that affect it. Examples include urethritis, urethrostenosis and incontinence. Urology is a su...
Cardiology is a specialty of internal medicine. Cardiac electrophysiology : Study of the electrical properties and conduction diseases of the heart. Echocardiography : The use of ultrasound to study the mechanical function/physics of the h...