Interventional Cardiology/Investigational Devices
Purpose of Research
The purpose of this study is to compare cardiac resynchronization therapy (CRT) response rates between AV Delay programming schemes defined by SmartDelay or a Fixed AV Delay of 120ms. CRT response is defined by a decrease in Left Ventricular End Systolic Volume (LVESV) ≥ 15% at 6 months compared to pre-implant baseline.
Subjects with heart failure