Active clinical trials for "Cardiomyopathies"

About 60% of patients with hypertrophic cardiomyopathy have microvascular dysfunction. Microvascular dysfunction is directly related to prognosis in hypertrophic cardiomyopathy. This new measurement method is microcirculation resistance (MR) based on quantitative flow ratio (QFR), which does not need a pressure guide wire on the basis of angiography. The QFR system is used to evaluate the blood vessels distal pressure and blood flow, and their ratio is microcirculation resistance (MR). The quantitative blood flow fraction measurement system was analyzed by interventional laboratory platform image analysis software (AngioPlus 2.0). This study is a single-center retrospective cohort study. Participants were selected from patients who were diagnosed with hypertrophic obstructive cardiomyopathy in Fuwai Hospital from January 2020 to November 2021. The risk factor is whether there is microcirculation resistance disorder. The outcome was the major adverse cardiovascular events related to HCM (including all-cause death, heart transplantation, left ventricular pacemaker, and heart failure readmission) that were followed up one year after angiography. Aim To further clarify whether there is a certain correlation between microvascular resistance and adverse cardiovascular prognosis.

Use lay language. Current guidelines regarding physical activity in patients with inherited arrhythmia and cardiomyopathy are mostly dedicated to adult patients, with a special focus on sports competition. Their application to the pediatric population has been scarcely evaluated. Physical activity is well known for its health benefits but may be dangerous in this population, which leads to confusion within the medical community and among patients. Actual physical activity of children with such inherited cardiac disorders is unknown. This study aimed to assess the level of physical activity in children with inherited arrhythmia and cardiomyopathy, and the adherence to the current European guidelines on the subject. Secondary objectives aimed to assess through a qualitative analysis the impact of the disease on physical activity and daily life in this population. The level of physical activity and adherence to current guidelines will be determined from interviews between the patient and the principal investigator. Each patient will be questioned in order to explore the experiences, motivations and feelings of participants regarding physical activity. The standardized questionnaire was created by the principal investigator and members of the clinical research team. The investigators believe that many children practice physical activity outside the current guidelines and hope to identify the main determinants of physical activity in this population.

The purpose of this study is to determine, among a large cohort of 300 consecutive patients with hypertrophic cardiomyopathy, if extended ambulatory monitoring using the iRhythm Technologies, Inc. Zio XT device results in identifying a greater burden of nonsustained ventricular tachyarrhythmia (nsVT) compared to current ACCF/AHA guideline recommended 48-hour monitoring.

The purpose of the study is to investigate the potential correlations of global longitudinal strain and peak left atrial strain, measured by speckle tracking echocardiography with the severity of hypertrophic cardiomyopathy and the risk for arrhythmias. Specifically the investigational questions are: Is there a correlation between myocardial deformation parameters of the left heart chambers with other important ultrasound parameters (eg maximal wall thickness, presence of subaortic obstruction, etc.) in patients with hypertrophic cardiomyopathy? Is there a correlation between myocardial deformation parameters of the left heart chambers and the symptomatology or functional capacity of patients with hypertrophic cardiomyopathy? Is there a correlation between the myocardial deformation parameters of the left heart chambers and the exercise capacity, as evidenced by the cardiopulmonary exercise test, in patients with hypertrophic cardiomyopathy? Is there a correlation between myocardial deformation parameters of the left heart chambers with the risk of ventricular or supraventricular arrhythmias in patients with hypertrophic cardiomyopathy? Is there a correlation between myocardial deformation parameters of the left heart chambers and risk factors for sudden death?

The goal of this study is to evaluate left atrial structural and functional abnormalities in stroke of undetected mechanism and atherosclerotic stroke with cardiac MRI.

Type 1 diabetes mellitus is a chronic autoimmune disease, associated with an increased risk of cardiovascular diseases. The development of cardiomyopathy in type 1 diabetes, independent of hypertension and coronary heart disease, is still controversial. A possible mechanism for diabetic cardiomyopathy is autonomic dysfunction. This study aims to evaluate cardiac function and structure, and to relate them with autonomic dysfunction in type 1 diabetes.

Assessment of wall thickness in hypertrophic cardiomyopathy (HCM) is of diagnostic and prognostic importance given its known association with sudden cardiac death. However, data regarding comparison of imaging modalities for this key measurement is lacking. This study seeks to compare assessment of maximum wall thickness between clinically indicated echocardiography (with and without contrast) and clinically indicated cardiac magnetic resonance imaging.

The purpose of this study is to characterize the frequency of TTR mutations in subjects suspected of having cardiac amyloidosis

This is a case-control association study with multicentric prospective recruitment. Tako-TSUBO cardiomyopathy is a new clinical entity mimicking an acute coronary syndrome. It is characterized by reversible left ventricular dysfunction that is frequently precipitated by a stressful event and most of patients are postmenopausal women. Several hypotheses concerning pathogenesis of Tako-TSUBO cardiomyopathy have been proposed, but at present, exaggerated sympathetic stimulation is the main hypothesis. However, the investigators don't know why some patients with stressful event may present Tako-TSUBO cardiomyopathy whereas most of them don't. The investigators hypothesize that polymorphisms in the genes involved in the adrenergic pathway resulting in greater catecholamine sensitivity would be associated with an increased risk of Tako-TSUBO cardiomyopathy.

The purpose of this study is to determine the prevalence of Fabry mutations in patients with left ventricular hypertrophy (moderate to severe), as measured by echocardiography.This study is a screening study