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Development Of Non-surgical Approach To Treating Tricuspid Regurgitation
Funder
National Health and Medical Research Council
Funding Amount
$266,427.00
Summary
Heart failure is a common problem in which the heart enlarges and contracts poorly. In association with enlargement of the heart, the heart valves also begin to fail causing further worsening of quality and length of life. Failure of the tricuspid valve occurs in upto 87% of patients with heart failure and presently the only treatment option is high risk heart surgery. We are developing a way of dealing with tricuspid valve failure that does not require cardiac surgery.
Cardiac-specific Therapy Targeting Hypertrophy And Apoptotis
Funder
National Health and Medical Research Council
Funding Amount
$542,683.00
Summary
We have discovered that certain pathological responses in the heart are mediated by an unusual type of signalling protein. The aim of the proposed studies is to determine whether this unusual signalling mechanism can provide a good target for development of new therapeutic approaches to prevent or treat heart failure.
Single-Beat Preload Recruitable Stroke Work Measurement Of Cardiac Contractility In Three Mammalian Models.
Funder
National Health and Medical Research Council
Funding Amount
$241,980.00
Summary
The accurate measurement of the inherent pumping capacity of the heart muscle is difficult because (i) most measurements currently in use cannot accurately discriminate between the contribution of the heart muscle and that of the vascular system to the results obtained, and (ii) the measurements which can discriminate currently require invasive measurements and procedures that frequently restrict their use. The overall purpose of this proposal is to more rigorously validate a promising method we ....The accurate measurement of the inherent pumping capacity of the heart muscle is difficult because (i) most measurements currently in use cannot accurately discriminate between the contribution of the heart muscle and that of the vascular system to the results obtained, and (ii) the measurements which can discriminate currently require invasive measurements and procedures that frequently restrict their use. The overall purpose of this proposal is to more rigorously validate a promising method we have developed that will (i) make accurate assessment possible from a single cardiac beat in both experimental animals and human subjects; (ii) reduce the number of experimental animals required for such measurements by permitting sequential measurements in the same animals; (iii) make it possible to perform such measurements non-invasively in human subjects.Read moreRead less
Determination Of Disease Specific Epitopes In Rheumatic Heart Disease In Australia
Funder
National Health and Medical Research Council
Funding Amount
$374,817.00
Summary
Rheumatic Fever and Rheumatic Heart Disease (RF-RHD) remain a significant cause of illness in Aboriginal communities in Australia. RF-RHD is a complication which follows infection with a specific bacterium. The purpose of this study is to compare the body's response and find out the patterns of antibody and immune cell reactivity to the bacterium and body proteins in RF-RHD patients and controls. It will also enable us to study the mechanisms that initiate the disease process.
Determinants Of Occurrence And Progression Of Aortic Stenosis In Bicuspid And Tricuspid Valves.
Funder
National Health and Medical Research Council
Funding Amount
$546,394.00
Summary
Aortic stenosis (AS) is a major cause of cardiac failure and mortality in ageing Australians. AS occurs both in bicuspid aortic valves (BAV;0.5-1% of the population) and in anatomically tricuspid valves. There is an associated incremental risk of myocardial infarction. The research will investigate patients with BAV and with early AS in tricuspid valves, in order to examine the potential roles of loss of nitric oxide effect and of oxidant stress as predictors of AS development.
Novel Multi-Modality Assessment Of Arrhythmic Risk And Disease Progression In Repaired Tetralogy Of Fallot Undergoing Redo-Pulmonary Valve Surgery Using 4D Cardiac MRI Flow And High Density 3D Electro-Anatomical Mapping.
Funder
National Health and Medical Research Council
Funding Amount
$110,703.00
Summary
Sudden death from arrhythmia is the most common cause of death in adults with tetralogy of Fallot, a type of congenital heart disease. It has been shown that dangerous arrhythmias can be induced in almost half of these patients when severe pulmonary valve disease is present. Our study will evaluate the potential for arrhythmias both before and after pulmonary valve surgery, using MRI and electrophysiological testing, to determine if these patients require defibrillators.
Sympathetic Nervous System Activation In Renal Failure. Its Contribution To Pathogenesis And Progression.
Funder
National Health and Medical Research Council
Funding Amount
$490,796.00
Summary
Cardiovascular morbidity and mortality is exceedingly high in patients with chronic renal failure and particularly end stage renal disease. Recent studies suggest that sympathetic activation contributes substantially to the development of hypertension, progression of renal disease and cardiovascular prognosis in these patients. Increased sympathetic nerve firing has been demonstrated in end stage renal disease by the use of clinical microneurography, which has been attributed to uremia-related t ....Cardiovascular morbidity and mortality is exceedingly high in patients with chronic renal failure and particularly end stage renal disease. Recent studies suggest that sympathetic activation contributes substantially to the development of hypertension, progression of renal disease and cardiovascular prognosis in these patients. Increased sympathetic nerve firing has been demonstrated in end stage renal disease by the use of clinical microneurography, which has been attributed to uremia-related toxins. However, renal transplant recipients with excellent graft function and no signs of uremia still exhibit increased sympathetic nerve firing. Most interestingly, bilateral nephrectomized patients have nerve firing rates comparable to that of normal control subjects without renal disease. These data suggest that the diseased kidneys exert excitatory effects on the sympathetic nervous system independent of correction of uremia. The proposed study aims to comprehensively investigate the pattern of sympathetic activation both centrally (microneurography) and regionally (radiotracer dilution methodology) in patients with chronic renal failure and end stage renal disease . The effect of the centrally acting sympatholytic drug rilmenidine on sympathetic activity in the setting of renal disease will be assessed. Patients with ESRD waitlisted for kidney transplantation will be studied before and after transplantation. Some of the transplant recipients will also have undergone uni- or bilateral nephrectomy before transplantation which will enable us to further explore the role of the diseased kidneys in sympathetic activation. The results of this study may prove to have significant implications for treatment and prevention of cardiovascular morbid events frequently associated with renal disease.Read moreRead less
Provision Of Secondary Cardiac Preventive Australian General Practice
Funder
National Health and Medical Research Council
Funding Amount
$499,513.00
Summary
This study will provide a comprehensive description of secondary preventative activities for patients with ischaemic heart disease, with the aim of determining those factors that can most contribute to reducing the increased risk of further events which they experience, and thereby reducing the burden of this disease.