Trial of Arsenic Trioxide With Ascorbic Acid in the Treatment of Adult Non-Acute Promyelocytic Leukemia (APL) Acute Myelogenous Leukemia

Inclusion Criteria: * Diagnosis of non-APL AML (FAB subtypes M0 - M7 but excluding M3) confirmed by myeloperoxidase stain and/or flow cytometry. * For patients of age 18 or older - only refractory or relapsed AML will be included. Refractory disease is defined as newly diagnosed patients who fulfill ONE of the following criteria: * Patient aged 60 years or younger, who have failed to achieve a complete remission after at least two cycles of front line induction chemotherapy. * Patients of any age who have AML, that is post myelodysplastic syndrome (MDS), who failed to achieve a complete remission after at least one cycle of front line induction chemotherapy. * Patients aged 60 years or older who failed to achieve a complete remission after at least one cycle of front line induction chemotherapy. * Newly diagnosed patients aged 55 or older who will not receive intensive anti-leukemia chemotherapy can also be enrolled. * Post-myelodysplasia AML and secondary AML are included. * Stem cell transplantation failures are included. * Karnofsky performance status greater or equal to 50%. * Adequate renal function (creatinine \< 1.5 x ULN or creatinine clearance \> 60 ml/min) and hepatic function (transaminases \< 2.5 x ULN, serum total bilirubin \< 3 mg/dl). * Females of childbearing potential must have a negative serum pregnancy test prior to enrollment on the study, and both women and men must use an effective birth control method while on the study. * Signed consent. Exclusion Criteria: * Newly diagnosed patients older than age 55 who: * Refuse chemotherapy when their treating physician recommends standard anti-leukemia induction chemotherapy. * Have a Karnofsky performance status of greater or equal to 70%, aged \< 75 years and has no prior myelodysplastic syndrome. * Have a risk/benefit ratio that gives their treating physician good reason for administration of standard anti-leukemia induction chemotherapy. * Patients who have already been treated with arsenics. * CML in blastic crisis. * Patients with cardiopathies including recurrent supraventricular arrhythmia and any type of sustained ventricular arrhythmia or conduction block (A-V block grade II or III, LBBB). * Patients with HIV. * Pregnant or breastfeeding women. * QT interval \> 460 msec in the presence of serum potassium \> 4.0 mEq/L and magnesium \> 1.8 mg/dL. * Pre-existing neurotoxicity/neuropathy of Grade 2 or greater according to the NCI Common Toxicity Criteria Version 2. * History of preexisting neurological disorders (grade 3 or higher by the NCI Common Toxicity Criteria; in particular, seizure disorders). * Patients with an underlying medical condition that could be aggravated by the treatment or life threatening disease unrelated to AML as evaluated by the enrolling physician. * Patients with active second malignancy, excluding adequately treated basal or squamous cell carcinoma of the skin, or carcinoma in situ of the cervix. * Inability or unwillingness to comply with the treatment protocol.