Sensor Optimization of Cardiac Resynchronization Therapy Response

Exclusion Criteria

• •Subject has congenital heart disease
• •Subject has a tachyarrhythmia (atrial and/or ventricular) at the time of enrollment and a cardioversion will not be attempted prior to the research procedure
• •Subject has unstable coronary artery disease
• •Subject cannot undergo transvenous catheterization
• •Subject has a mechanical tricuspid or aortic valve prosthesis or history of significant structural tricuspid or aortic valvular disease
• •Subject requires dual chamber cardiac pacing or single chamber (ventricular) pacing at rest for rate control
• •Subject has a recent echocardiogram (within prior 6 months) which revealed the presence of an LV thrombus
• •Subject is pregnant
• •Subject is enrolled in a concurrent study that may confound the results of this study without documented pre-approval from Medtronic study manager