Inclusion Criteria:  18 Years and older Non-ST-segment elevation acute coronary syndrome patients with at least 1 non-IRA Diameter stenosis of 50%-90% by visual estimate Reference vessel size > 2 mm in stenotic segment by visual estimate  Exclusion Criteria:  LVEF ≤ 40% eGFR < 60 mL/min Allergy to contrast media, adenosine Prior CABG