['angina']
['ranolazine', 'sugar pill']

        Inclusion Criteria:

          -  Adult patients >= 18 years of age referred for cardiac catheterization for evaluation
             of cardiac symptoms ( angina, fatigue, or shortness of breath)

          -  At least 1 indeterminate stenosis (20-80%),

          -  Fractional flow reserve (FFR) <=0.8 and PCI deferred

        Exclusion Criteria:

          -  Coronary revascularization (percutaneous coronary intervention or coronary artery
             bypass grafting) during the index procedure or anticipated within the next month

          -  acute coronary syndrome or cardiogenic shock

          -  QTc > 500 milliseconds

          -  use of strong inhibitors of CTP3A (i.e. ketoconazole, itraconazole,
             clarithromycin,nefazodone, nelfinavir, ritonavir, indinavir and saquinavir)

          -  use of inducers of CYP3A (i.e. rifampin, rifabutin, rifapentine, phenobarbital,
             phenytoin, carbamazepine, and St. John's wort)

          -  liver cirrhosis

          -  sever renal insufficiency (i.e. creatinine clearance < 30mL/min/1.73 m2)
      