No ongoing cardiac dysrhythmias of grade >= National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version ., uncontrolled atrial fibrillation (any grade), or corrected QT (QTc) interval > msec Ongoing cardiac dysrhythmias of NCI CTCAE v. Grade or prolongation of the QTcF interval to > msec. History of ventricular dysrhythmias or risk factors for ventricular dysrhythmias Any ongoing cardiac dysrhythmias of National Cancer Institute (NCI) CTCAE grade > , NCI CTCAE grade atrial fibrillation, or corrected QC interval per Fridericia's formula (QTcF) interval > msec, except for documented right bundle branch block, at screening Clinically significant cardiovascular disease, active or within months prior to enrollment. Ongoing cardiac dysrhythmias, uncontrolled atrial fibrillation, bradycardia or congenital long QT syndrome Any history of CTCAE grade ? cardiac dysrhythmias within the last months. Patients with non-QTc CTCAE grade cardiac dysrhythmias may be considered for inclusion, with the approval of the medical monitor, if the dysrhythmias are stable, asymptomatic, and unlikely to affect patient safety. Ongoing cardiac dysrhythmias of National Cancer Institute (NCI) CTCAE grade >= or prolongation of the corrected QT interval (QTc) interval to > msec History of ventricular dysrhythmias or risk factors for ventricular dysrhythmias Ongoing cardiac dysrhythmias of NCI CTCAE version . grade >= . Controlled atrial fibrillation is permitted. Cardiac exclusions specific to glasdegib and OX containing arms: Any one of the following ongoing or in the previous months: congenital long QT syndrome, torsades de pointes, sustained ventricular tachyarrhythmia, right or left bundle branch block and bifascicular block, unstable angina, coronary/peripheral artery bypass graft, cerebrovascular accident (CVA), transient ischemic attack or symptomatic pulmonary emboli, as well as bradycardia defined as < beats per minute (bpm)s. Active cardiac dysrhythmias of NCI CTCAE grade >= (eg, atrial fibrillation) or corrected QT (QTc) interval > msec. Cardiac dysrhythmias of NCI CTCAE grade >= within the last days History of or ongoing cardiac dysrhythmias requiring treatment, atrial fibrillation of any grade, or persistent prolongation of the QTc (Fridericia) interval to > msec for males or > msec for females. Ongoing symptomatic cardiac dysrhythmias, uncontrolled atrial fibrillation, or prolongation of the corrected QT interval defined as > msec for males and > msec for female Patient must not have ongoing ventricular cardiac dysrhythmias of grade >= as described by the Cancer Therapy Evaluation Program (CTEP) version . of the National Cancer Institute (NCI) CTCAE Ongoing cardiac dysrhythmias of NCI CTCAE version . grade >= ; controlled atrial fibrillation is permitted No ongoing cardiac dysrhythmias, atrial fibrillation, or prolongation of corrected QT (QTc) interval to > msec Ongoing symptomatic cardiac dysrhythmias or uncontrolled atrial fibrillation Cardiac dysrhythmias; Ongoing cardiac dysrhythmias Sustained or symptomatic ventricular dysrhythmias uncontrolled with drug therapy or implantable device uncontrolled dysrhythmias causing hemodynamic compromise, Ongoing cardiac dysrhythmias of NCI CTCAE Grade ? , uncontrolled atrial fibrillation of any grade, or an average of triplicate QTc interval > msec.