4. Continued from Exclusion #4: (e) Any history of second or third degree heart block unless they currently have a pacemaker; (f) Heart rate < 50 / minute on pre-entry electrocardiogram;(g) Uncontrolled hypertension defined as systolic blood pressure > 150 or diastolic >100;(h) Subjects with hypokalemia or hypomagnesemia if it cannot be corrected prior to dasatinib administration.