View clinical trials related to Cardiomyopathies.
Filter by:Purpose This cardiac dysfunction in patients with Duchenne muscular dystrophy is associated with minor cardiac damage as indicated by elevation of plasma cardiac troponin I (cTnI). The purpose of this study is to investigate whether the administration of Carvedilol can suppress the minor cardiac damage and prevent deterioration of cardiac function.
Dilated cardiomyopathy (DCM) affects about 200,000 Canadians. Eighty percent of these cases are of unclear cause, often occuring in families. We believe that mutations in specific already-identified genes contribute to DCM in Quebec and that certain mutations may account for a significant proportion of cases due to the well-documented "founder effect". Two hundred patients with DCM followed in our Heart Function Clinic will be approached for one blood sample at their routine clinic visit to test this hypothesis. The samples will be tested in the Laboratory of Cardiovascular Genetics at the Royal Victoria Hospital.
Hypertrophic Cardiomyopathy is an inherited condition characterized by thickening (hypertrophy) of the heart muscle. Many patients who have this condition have a reduced ability to exercise because of breatlessness, which can in some cases be severe. This appears in most cases to be due to an impairment of the filling of the heart, especially on exercise this limits the amount of blood the heart is able to pump. Several factors may contribute to this slow filling of the heart, including (1) The heart contracts and relaxes in an incoordinate way (called 'dyssynchrony') which is inefficient, and (2) The filling of the main pumping chamber (the left ventricle) may be impeded by high pressure in the other ventricle(the right ventricle)- in other words the left ventricle is 'squashed' by the right ventricle. This is known as diastolic ventricular interaction. Although drugs can improve the filling of the heart and relieve symptoms, some patients remain very symptomatic despite these drugs. The mechanisms responsible for the filling abnormality in patients with Hypertrophic Cardiomyopathy are similar to those seen in the much more common condition known as Heart Failure. A special type of pacemaker technique called 'Biventricular Pacing' has been shown to markedly improve symtoms in patients with heart failure. This form of pacing has been shown to improve both 'dyssynchrony' ( incoordination) and 'ventricular interaction' (squashed left heart) in patients with Heart Failure. We propose that Biventricular pacing may similarly improve these abnormalities in patients with Hypertrophic Cardiomyopathy, resulting in an improvement of symptoms. The study will focus on patients with the condition who have severe symtoms despite being on optimal currently available drug therapy.
Any time the words "you," "your," "I," or "me" appear, it is meant to apply to the potential participant. The goal of this laboratory research study is to collect and store blood and tissue from patients who have a diagnosis of heart disease and may be at a high risk for the development of heart failure. This blood may be used in the future to identify genes that may play a role in developing congestive heart failure (CHF) from chemotherapy or other sources. This is an investigational study. All will be enrolled at MD Anderson.
The aim of this study is to compare the effect of treatment with verapamil or carvedilol on long-term outcomes in stable, chronic heart failure secondary to non-ischemic cardiomyopathy.
Accumulated clinical and experimental data suggest that dysfunctional coronary microcirculation plays a pivotal role in the progression of heart failure despite an optimal therapy used. Therefore, we hypothesize that improvement in microvascular function by calcium antagonist, verapamil may result in additional clinical benefit. Thus, the aim of this study is to compare the effect of treatment with verapamil or carvedilol on long-term outcomes in stable, chronic heart failure secondary to non-ischemic cardiomyopathy.
Compare data (structural and functional) obtained by transthoracic rest echocardiography and magnetic resonance imaging (with gadolinium) in 30 patients with hypertrophic cardiomyopathy
The goal of this study is to better characterize peripartum cardiomyoapthy or pregnancy-related cardiomyopathy by enrolling as many PPCM survivors as possible using both direct and web-based methods of recritment. Patients will anser a questionnaire regarding the onset, progression, treatment and follow-up of their diagnosis as well as the psychosocial aspects of PPCM.
The aim of this study is the identification of familial congenital arrhythmogenic disorders and their clinical follow-up.
Cardiac resynchronization therapy has been shown to be effective in reducing symptoms and mortality in heart failure patients. However, very few is known about the importance of the left ventricular pacing site. We study in a random order 11 different left ventricular pacing sites and compare their hemodynamics using pressure-volume catheters. The consequences on the surface ECG are also assessed.