Active clinical trials for "Tachycardia, Ventricular"

The purpose of this study is to evaluate feasibility of using new technologies to characterize ventricular wall motion in patients indicated for mapping and ablation procedures. Echo will be performed preoperatively and patients will receive a 1-month followup telephone call.

The purpose of this study is to determine if heredity influences the risk of life-threatening heart rhythms (ventricular tachycardia and ventricular fibrillation) after heart attack (myocardial infarction).

Observational study is evaluating Ventricular Tachycardia (VT)/Ventricular Fibrillation (VF) thérapies as a function of ventricular pacing

This study evaluates the date of the first appropriate and/or inappropriate therapy in patients implanted with a Guidant PRIZM or VITALITY defibrillator and is evaluating eventual predictive risk factors for appropriate/inappropriate therapies as well as the influence of the programmed parameters on these therapies.

Predict-VT is an investigator-initiated, prospective, observational clinical trial. Four hundred patients with ST elevation acute myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PPCI) will be included. The primary end point is a composite of ventricular tachyarrhythmia (VTA) and sudden cardiac death (SCD). VTAs will be recorded using continuous electrocardiographic (ECG) monitoring in the coronary unit for the first 72 hours, standard ECG and ECG holter monitoring. For the analysis of myocardial function, conventional 2D echocardiography and tissue doppler will be used. For the evaluation of myocardial mechanics, 2D speckle tracking, strain, strain rate and mechanical dispersion will be obtained. Important clinical, laboratory and angiographic variables will also be examined. Patients will be followed-up at 40 days and 1 year. The optimal VTA prediction model will be constructed using logistic regression and bootstrap models. Patients who experience primary end point should undergo secondary SCD prevention using implantable cardioverter defibrillator (ICD). Patients with left ventricular ejection fraction (LVEF) < 35%, 40 days post acute myocardial infarction (AMI), will be candidates for primary SCD prevention.

Prophylactic substrate ablation in post-MI patients undergoing defibrillator implantation reduces appropriate defibrillator therapies.

To investigate changes in HRV during the time before a spontaneous episode of ventricular tachyarrhythmia.

The ABCD clinical study (ClinicalTrials.gov Identifier NCT00187291) was designed to determine if a T-Wave Alternans (TWA) test is equivalent to an Electrophysiology Study (EPS) in predicting life-threatening heart rhythms in patients with ischemic heart disease, left ventricular dysfunction, and non-sustained tachycardia. The purpose of the ABCD Genetic sub-study is to identify genetic markers that predict TWA status and arrhythmia risk in this same population.

The CASPER will collect systematic clinical assessments of patients and families within the multicenter Canadian Inherited Heart Rhythm Research Network. Unexplained Cardiac Arrest patients and family members will undergo standardized testing for evidence of primary electrical disease and latent cardiomyopathy along with clinical genetics screening of affected individuals based on an evident or unmasked phenotype.

Heart failure with preserved ejection fraction (HFPEF) is a large medical problem, for which no drug or device has a recommendation in current heart failure guidelines. Sudden cardiac death is suggested as the most common cause of death in HFPEF patients, although data is sparse. Use of an Implantable Loop Recorder (ILR) may be useful in patients with HFPEF to evaluate the incidence of sustained ventricular tachyarrhythmias. If ventricular tachyarrhythmias are seem frequently, treatment with an Implantable Cardioverter Defibrillator (ICD) may be an option in the future.