Participants in this study have a reduced pumping ability of the heart. The two sides of their heart do not beat in sync with each other, and as a result, the amount of blood that is pumped out of the heart is less than it should be. This study asks whether an electrical treatment may keep heart failure from getting worse. This treatment is called cardiac resynchronization therapy (CRT) and is provided by an electronic medical device implanted in the body that provides electrical pacing to both of the lower chambers (ventricles) of the heart so they can beat in sync and pump blood to the body more efficiently. In this study, the device used is a Cardiac Resynchronization Therapy Pacemaker (CRT-P) device made by Medtronic called the Consulta® cardiac resynchronization therapy pacemaker or the CRT-P device.
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