View clinical trials related to Myocardial Dysfunction.
Filter by:The study is designed to evaluate the effects of L-arginine on myocardial structure and function and circulating microRNAs in patients with arterial hypertension. The study will analyze the impact of 4 weeks treatment randomized to L-arginine or placebo, on mechanical-energy efficiency (MEE) and longitudinal strain in patients with arterial hypertension. The investigators will also assess whether the changes in MEE and strain induced by L-arginine treatment is associated with changes in circulating micro RNAs.
Knowledge on the changes in myocardial function in the last weeks before birth and during the first year of life is limited. Through fetal and post-natal echocardiography we intend to describe these changes using myocardial tissue recognition techniques (Speckle tracking echocardiography and Tissue Doppler echocardiography) in healthy neonates, born to term of healthy women after uncomplicated pregnancies. We will compare the findings in this cohort to a cohort of neonates born to term of women with severe pre-pregnancy obesity. Sick neonates in intensive care units with various cardiac and non-cardiac conditions are often exposed to treatment that may affect both their cardiac function and important echo-variables per se. Using echocardiography, we will examine these changes in neonates treated with blood transfusion, catecholamines and in those treated with Ibuprofen due to a haemodynamic significant arterial duct.
This is an observational study assessing coronary microvascular function in healthy controls with normal kidney function, living kidney donors, pre-dialysis patients with chronic kidney disease stage 5 and patients on peritoneal dialysis.
The myocardial tissue is the most likely structure affected by hyperglycemia. The myocardial performance index (MPI) is a pulsed wave Doppler-derived index of global myocardial function. It is defined as the sum of the isovolumetric contraction time (ICT) and isovolumetric relaxation time (IRT) divided by the ejection time (ET) The fetal right heart contributes more to the cardiac output than the left heart; therefore, it is important to assess the right ventricular function. The investigators will measure right ventricular MPI in diabetic and normal pregnancies.
Several drugs and chemotherapies seem to induce myocarditis. This study investigates reports of myocarditis, including the International classification of disease ICD-10 for treatments in the World Health Organization (WHO) global Individual Case Safety Report (ICSR) database (VigiBase).
This prospective, observational study evaluates the accuracy of stress testing with the MyoStrain SENC CMR Imaging System to detect myocardial ischemia and viability in patients with suspected coronary artery disease using low levels of stress.
Vitamin D deficiency is recognized as a cardiovascular risk factor. Diabetic patients are of major risk for cardiovascular diseases and typically present with Vitamin D deficiencies. Myocardial function is altered in both type I and II diabetic patients but no data is today available on the effect of Vitamin D supplementation. The aim of the study will be to investigate myocardial function (by deformation imaging techniques) at rest and during low-dose dobutamine stress echocardiography in both type I and II diabetic patients. Within each diabetic population, myocardial function will be compared at baseline between the vitamin D deficient and non-deficient individuals. Furthermore, the investigators will study the effect of a 3 month supplementation in those with deficiencies.
This study evaluates the effect of the use of nasal CPAP in the cardiac function, measured by strain and TEI index, in patients with type 2 diabetes mellitus, obstructive sleep apnea and obesity. In order to do so, 76 patients will be studied, half will use sham CPAP and half will use therapeutic CPAP for three months, with echocardiogram, laboratory studies, ambulatory monitoring of arterial tension and sleep study before and after CPAP use.
As part of cardiac and hemodynamic evaluation of patients, echocardiographic measurements allow indirect evaluation of left ventricular filling pressures (LVFP). These ultrasound parameters, including mitral valve doppler and mitral ring doppler (in particular the E / E 'ratio), are well validated in medical cardiology and in some resuscitation patients. The measurement of filling pressures is an important daily element in the medical management of patients in intensive care, in particular on the hemodynamic and respiratory levels. No studies have evaluated the relevance of these markers in a postoperative context of cardiac surgery. Indeed, the surgery alters the cardiac function, which could modify the values of the echocardiographic parameters and their predictability. Left atrium pressure (LAP) directly reflects LVFP and is measured in cardiac surgical resuscitation by a surgically placed catheter as part of routine institutional care and will serve as gold-standard. To study the clinical significance of these LAP and LVFP values estimated by cardiac ultrasound, we will study their correlation with clinical and ultrasound signs of acute lung edema (ALE).
The purpose of this study is to assess the effect of bosentan on the myocardial metabolism and the dependent endothelial coronary vasomotoricity in patients presenting a PAH. Hypothesis : Bosentan may improve right ventricular function by decreasing myocardial stress and glucose metabolism. Patients may benefit from images with 18F-FDG PET / CT and 82Rb PET / CT for an earlier assessment and optimal management of PAH.