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Cardiac resynchronization therapy (CRT) is a recommended treatment for selected patients with symptomatic heart failure (HF). Although most treated patients show a benefit from CRT, a lack of response is observed for about 25-30% of them whatever the response criteria used either based on the clinical status (NYHA class, Packer clinical composite score) or on ventricular remodeling parameters assessed by echography (Left ventricle end of systole volume). This rate has remained remarkably stable since the therapy started and has motivated many studies to better understand the underlying physiopathology and the CRT action mechanisms.
Among the various research axes to improve CRT response and responders rate, increasing the number of pacing sites in an attempt to better homogenize the cardiac mechanical activity has been evaluated. A configuration with two RV leads and one LV lead was tested acutely in three studies. In all cases, it demonstrated a significant improvement of cardiac performance whether assessed by echographic parameters or LV dp/dt measurements. Additionally feasibility of this approach for long term CRT delivery was demonstrated during a previous study. First results with triple-site ventricular stimulation are encouraging and its clinical efficacy should now be tested on a larger population in order to conclude on its interest for CRT candidates.
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment
Cardiac Resynchronization Therapy
Cardiac resynchronization therapy implantation, Stimulation of 3 ventricular sites, Stimulation of 2 ventricular sites, Echocardiography
Rouen University Hospital
Not yet recruiting
University Hospital, Rouen
Published on BioPortfolio: 2016-11-15T11:38:21-0500
Despite technological progresses the rate of non-responders to cardiac resynchronization therapy (CRT) remains close to 30%. This inconsistent effect of CRT might be due to incomplete resy...
Cardiac resynchronization is a recommended therapy for patients with advanced heart failure, under optimized medical treatment with reduced left ventricular ejection fraction and prolonged...
The purpose of this study is to demonstrate that epicardial and transvenous left ventricular leads are safe and effective for cardiac resynchronization therapy in heart failure patients im...
The purpose of this study is to determine whether cardiac resynchronization therapy with the use of an implanted electronic pacemaker reduces morbidity associated with chronic thromboembol...
Empirical implantation of the left ventricular lead is the prevailing practice in cardiac resynchronization therapy device implantation. The response rate to the therapy has been uniforml...
Cardiac Resynchronization Therapy (CRT) has been shown to reduce mortality and heart failure (HF) hospitalization but its effects on the rate of ventricular arrhythmias (VAs) appears to be neutral. We...
s: Cardiac resynchronization therapy (CRT) has shown to induce left ventricular reverse remodelling, but little is known about its influence on ventricular repolarization.
Previous studies indicated the importance of the intrinsic left ventricular (LV) electric delay (QLV) for optimal benefit to cardiac resynchronization therapy. We investigated the use of QLV for achie...
The recently developed quadripolar left ventricular (LV) leads have been developed to increase the benefit of cardiac resynchronization therapy (CRT). These leads offer the option to stimulate the LV ...
Cardiac resynchronization therapy (CRT) is an effective treatment option for therapy-refractory mild to severe heart failure (HF) patients with reduced ejection fraction and left ventricular (LV) cond...
Types of artificial pacemakers with implantable leads to be placed at multiple intracardial sites. They are used to treat various cardiac conduction disturbances which interfere with the timing of contraction of the ventricles. They may or may not include defibrillating electrodes (IMPLANTABLE DEFIBRILLATORS) as well.
Stimulation of the brain, which is self-administered. The stimulation may result in negative or positive reinforcement.
A technique of brain electric stimulation therapy which uses constant, low current delivered via ELECTRODES placed on various locations on the scalp.
Therapy for MOVEMENT DISORDERS, especially PARKINSON DISEASE, that applies electricity via stereotactic implantation of ELECTRODES in specific areas of the BRAIN such as the THALAMUS. The electrodes are attached to a neurostimulator placed subcutaneously.
Application of electric current in treatment without the generation of perceptible heat. It includes electric stimulation of nerves or muscles, passage of current into the body, or use of interrupted current of low intensity to raise the threshold of the skin to pain.
Cardiology is a specialty of internal medicine. Cardiac electrophysiology : Study of the electrical properties and conduction diseases of the heart. Echocardiography : The use of ultrasound to study the mechanical function/physics of the h...