16. Have a normal ECG; must not have any of the following: pathologic Q wave abnormalities, significant ST-T wave changes, left ventricular hypertrophy, right bundle branch block, left bundle branch block, advanced A-V heart block, non-sinus rhythm, excluding isolated premature atrial contractions (sinus rhythm is not between 55-100 beats per minute), or any other abnormality that, in the opinion of the MAI, makes it unsafe for the subject to participate in the study.