View clinical trials related to Cardiomyopathy, Dilated.
Filter by:With the present study the investigators intend to identify the morphologic and electrophysiologic substrate markers of increased arrhythmic risk in patients with dilated cardiomyopathy undergoing implantation of a defibrillator for the primary prevention of sudden cardiac death. Moreover, the investigators also aim to identify if there is any electrophysiological substrate modification at the time of the first arrhythmic event in these patients. To this aim, the investigators will prospectively correlate electroanatomic mapping and cardiac magnetic resonance findings with arrhythmic events, in order to identify substrate markers of increased arrhythmic risk in patients with dilated cardiomyopathy, who are therefore more likely to benefit from a defibrillator implantation. Furthermore, electroanatomic mapping will be repeated at the time of the first arrhythmic event and compared with that at baseline, in order to evaluate any electrophysiological substrate changes.
The purpose of this study is - To assess the value of dynamics (SVV, PPV) and static indices (GEDVI, ITBVI, CVP) of preload and its combination with contractility (CI,SV, ventricular power, dP/dtmax, CFI, GEF) and lung water indices (ELWI), as predictors of fluid responsiveness in both spontaneously breathing and mechanically ventilated pediatric patients. - To assess the value of stroke volume and pulse pressure changes from femoral pulse contour analysis (PiCCO2) during passive leg raising as predictor of fluid responsiveness in pediatric patients. - To establish normal and cutoff values of transpulmonary thermodilution (PiCCO2) hemodynamic variables in hemodynamically stables and hemodynamically "normal" patients.
Shortness of breath, fatigue, and exercise intolerance are clinical symptoms of chronic heart failure (CHF). Recent studies suggested that peripheral impairment was the major cause of clinical symptoms, and mechanism may be related to neuroendocrine impairment and vascular smooth muscle dysfunction. It results in increased peripheral resistance that may influence limb blood flow, muscle fitness and activities of daily.The purposes of this study are 1. to compare muscular strength, endurance, and perfusion of quadriceps between CHF patients and healthy controls by isokinetic test and near-infrared spectroscopy (NIRS) and difference in activities of daily living 2. to compare endothelium function between CHF patients and healthy control subjects 3. the relationship between endothelium function, muscular strength, endurance, perfusion, and metabolism of quadriceps.
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.
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.
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.