Active clinical trials for "Cardiomyopathies"

The main purpose of this protocol is to provide a mechanism for continued access for patients that would have been enrolled into the primary cohorts of the IDE study.

Fibrosis, myocardial deformation and biomarkers in hypertrophic cardiomyopathy (HCM)

This is a prospective, single-center study to assess clinical phenotype and prognosis of different pathogenic mutations in Chinese patients with hypertrophic cardiomyopathy. Patients with hypertrophic cardiomyopathy were consecutively recruited, and then DNA samples were extracted from peripheral blood. Targeted sequencing of 142 genes was performed to obtain variants associated with hypertrophic cardiomyopathy. Patients will undergo face-to-face interviews, phone calls, or/and chart reviews at 6 months, 12 months, 24 months, 36 months, 48 months and 60 months for data collection of clinical outcomes.

Perioperative management may have strong connections with postoperative complications (PCs). However, little is known about the perioperative risk factors of PCs after septal myectomy in hypertrophic obstructive cardiomyopathy (HOCM) patients. This study is designed to assess the in-hospital PCs rate of HOCM patients and to identify perioperative risk factors of PCs in patients who underwent septal myectomy. Retrospective chart review will identify adult HOCM patients who underwent septal myectomy from October 2013 to December 2018 in the investigators' hospital. Patients' data will be collected from electronic medical records. The multivariable logistic regression analysis will be used to determine independent predictors. The predictive ability of individual predictor and different combination of multiple risk factors on PCs will also be calculated.

This is a purely observational project and the objectives are to record and analyze the local potentials at the site of Premature Ventricular Contraction (VPC) focus through the Rhythmia system, ti determine the short and long-term success of the procedure and compare it to the existing literature about standard procedures, to highlight the advantages of the system compared to conventional mapping and to characterize optimal pace map or activation map as achieved by the Rhythmia system.

The overall rationale is to reduce the risk of sudden cardiac death in individuals with hypertrophic cardiomyopathy (HCM). The novel approach of this study is to correlate Positron Emission Tomography (PET) findings to ventricular arrhythmias detected by the implantable cardioverter defibrillator (ICD). This could potentially lead to an improved risk stratification of HCM patients.

This study sought to develop an algorithm by collecting echocardiographic image information and related clinical information capable of quantitatively evaluating changes of the myocardium through machine learning. Moreover, the researchers investigate the usefulness of an algorithm for early diagnosis and differential diagnosis of infiltrative cardiomyopathy.

Patients with Ischaemic and Dilated Cardiomyopathy, face an increased risk for Arrhythmic Sudden Cardiac Death. The purpose of this study is to estimate the performance of Modern Non-Invasive Indices and the performance of Programmed Ventricular Stimulation in Sudden Cardiac Death Prediction.

It is universally recognised that current methods for risk stratification of sudden cardiac death (SCD) are limited. A novel SCD risk marker, the Regional Restitution Instability Index (R2I2), measures the degree of heterogeneity in electrical restitution using data obtained from a standard 12 lead ECG acquired during an invasive electrophysiological study. In an ischaemic cardiomyopathy (ICM) cohort of 66 patients, an R2I2 of ≥1.03 identified subjects with a significantly higher risk of ventricular arrhythmia (VA) or death (43%) compared with those with an R2I2 <1.03 (11%) (P=0.004). This study will use non-invasive techniques to acquire electrical restitution data: exercise and pharmacological stress, and will incorporate body surface potential mapping to develop a non-invasive and high-resolution form of R2I2. Suitable patients will be recruited into a prospective, observational study. HYPOTHESES: PRIMARY: R2I2 is predictive of ventricular arrhythmia (VA) / SCD in patients with ICM. The exercise stress protocol will create a dynamic range of heart rates that allows ECG quantification of electrical restitution heterogeneity that correlates with invasive R2I2 and is predictive of VA/SCD. The pharmacological stress protocol will create a dynamic range of heart rates that allows ECG based quantification of electrical restitution heterogeneity that correlates with invasive R2I2 and is predictive of VA/SCD. SECONDARY: A high-resolution electrical map acquired using body surface potential mapping will correlate with R2I2 and these data can be included in the R2I2 calculation to improve its prediction of SCD/VA. Serial measurement of R2I2 will produce consistent values.

The long term health and cardiovascular benefits of a regular exercise program have been well-established. National guidelines recommend involvement in moderate aerobic fitness (i.e. walking, bicycling, light jogging, swimming) for patients with hypertrophic cardiomyopathy (HCM). However, data on potential benefits of recreational exercise, useful parameters for risk stratification, and methods of devising individual exercise prescriptions are completely lacking. The specific aims of this study are: 1) to devise a safe moderate intensity exercise training program in patients with HCM, and 2) to determine whether exercise training improves ability to perform activities and tasks, heart size and function, and quality of life in patients with HCM.