Control Of Cardiac And Skeletal Contractility By Luminal Calcium Store Load In Health And Disease
Funder
National Health and Medical Research Council
Funding Amount
$415,138.00
Summary
Disorders affecting skeletal muscle and the heart can have life threatening effects and lead to impaired mobility and sudden cardiac death. This project will uncover the mechanisms of disorders which lead to skeletal muscle fatigue, chemotherapy induced toxicity in the heart and heart failure. Understanding these mechanisms may lead to successful gene therapy treatment and to the design of a new range of drug therapies to treat these devastating disorders.
Understanding how an old heart gets stiff. Aging is accompanied by a stiffening of the heart and reduced function, which is accelerated by cardiovascular disease and leads to heart failure. How the heart stiffens is poorly understood. A new mechanism is proposed here, involving structural membrane proteins (termed caveolae and cavins) and a signalling molecule (nitric oxide). The current research aims to unravel the interplay between cardiac cells and these proteins/signals to cause stiffness an ....Understanding how an old heart gets stiff. Aging is accompanied by a stiffening of the heart and reduced function, which is accelerated by cardiovascular disease and leads to heart failure. How the heart stiffens is poorly understood. A new mechanism is proposed here, involving structural membrane proteins (termed caveolae and cavins) and a signalling molecule (nitric oxide). The current research aims to unravel the interplay between cardiac cells and these proteins/signals to cause stiffness and to determine whether this process governs normal aging of the heart. This work will advance understanding of how heart function is determined and reveal how the human heart changes with normal aging. Read moreRead less
Central Blood Pressure: Physiology And Clinical Application
Funder
National Health and Medical Research Council
Funding Amount
$459,270.00
Summary
Current methods used by doctors to measure blood pressure (BP) have many limitations that could result in incorrect diagnosis and inappropriate treatment of high BP (hypertension). This research program will determine the clinical usefulness of new methods to diagnose and treat people with high BP. The underlying mechanisms contributing to high BP will also be examined. The findings will lead to improved ways to identify and more effectively manage people with high BP.
Restoring Microcirculatory Perfusion In ST-elevation Myocardial Infarction: The RESTORE MI Study
Funder
National Health and Medical Research Council
Funding Amount
$3,274,537.00
Summary
Current heart attack treatments have focussed on re-opening the blocked coronary artery but despite this, many patients still suffer significant heart damage because of inadequate blood flow to the heart muscle due to damage to the small blood vessels - the microcirculation. This study seeks to identify heart attack patients with damage to the microcirculation and will conduct a randomised trial of clot busting medications to reduce microcirculation damage and to improve heart function.
Mechanisms Underlying The Contribution Of Uremic Toxins To Cardiorenal Syndrome
Funder
National Health and Medical Research Council
Funding Amount
$413,533.00
Summary
Cardiorenal syndrome (CRS) is an umbrella term that defines disorders of the heart and kidneys whereby “acute or chronic dysfunction in one organ may induce acute or chronic dysfunction of the other”. We have demonstrated a significant association between heart and kidney fibrosis (scarring) and levels of a uremic toxin called indoxyl sulphate (IS), in relevant animal models and that blockade of production of this toxin reduces cardiac fibrosis. This project aims to explore this association.
Novel Therapy For Heart Failure With Preserved Ejection Fraction
Funder
National Health and Medical Research Council
Funding Amount
$1,068,984.00
Summary
Heart failure is a major cardiovascular problem. Up to half of the patients have a specific problem with heart muscle relaxation. There is no effective therapy for this type of heart failure. We will investigate the effects of new treatment approach using a range of experimental and clinical methods. If successful the treatment could move quickly into clinical practice.
Atrial Remodelling And Risk Of Arrhythmias In Endurance Athletes
Funder
National Health and Medical Research Council
Funding Amount
$1,006,750.00
Summary
Atrial fibrillation (AF) is a heart rhythm problem that is 3 to 5 times more common in male athletes than the general male population - the reasons for this excess are not known. We hypothesize that the cardiac enlargement that is caused by high intensity exercise training increases the risk of AF. We will assess heart structure and function in 420 athletes across the age spectrum and assess the degree to which sports-induced changes are permanent and whether this represents an AF risk.
Characterisation Of Sub-clinical Cardiac Dysfunction Using Novel Cardiac Exercise Imaging
Funder
National Health and Medical Research Council
Funding Amount
$429,552.00
Summary
Heart failure is caused by heart muscle weakness and is associated with reduced quality of life and survival. Identification of heart failure in its earliest stages provides clinicians with an opportunity to institute preventative measures and prevent patients from developing symptoms. This project utilises novel ultrasound and magnetic resonance imaging techniques performed during exercise to identify heart muscle weakness at its earliest stage.