The purpose of the study is to test a new way to pace the left side of the heart without using pacing leads, using the WiSE CRT System. In this study, ultrasound will be used to transfer energy from a new type of pacemaker through your body to a special receiver that is placed inside the left ventricle of your heart. The receiver will use the ultrasound energy to pace the heart without using pacing leads.
The purpose of this research study is to evaluate the different ways to program a Cardiac Resynchronization Therapy Defibrillator (CRT-D) through the use of software built into the CRT-D system. A CRT-D does not cure heart failure, but many people who receive a CRT device notice that they feel better. The objective of the device programming required by the SMART CRT study is to provide heart failure therapy which improves heart function.