Optima Coronary Artery Disease (CAD) (Optimal Mechanical Evaluation)

Inclusion Criteria 1. Ischemic Cardiomyopathy 2. Left ventricular ejection fraction less than 40% 3. Clinical indication for invasive electrophysiology testing 4. Patient is at least 18 years of age Exclusion Criteria 1. Unstable angina, acute myocardial infarction and/or revascularization procedure within 3 months 2. CVA or TIA within the past 6 months 3. Prosthetic heart valve 4. Patient is status post heart transplant 5. Women who are pregnant or with child -bearing potential and who are not on a reliable form of birth control. Women of child-bearing potential are routinely tested for pregnancy as part of the standard of care prior to EPS procedures being performed.