The patient is being treated with intravenous quinidine for malaria that was contracted while in Africa. Several hours after administration of the medication, the patient develops palpitations and dizziness. Electrocardiogram shows tachycardia and twisting of the QRS complexes around an isoelectric line. Which best describes the most likely etiology of this patient’s arrhythmia?

The 32-year-old patient presents complaining of severe itching on the arms that has gotten worse as her job has gotten more stressful. Upon assessment, the nurse observes erythematous lichen patches on the arms and in the antecubital fossa, where it is fissured and weeping. The nurse anticipates providing education about which medication?  

A nurse is taking care of a patient who has been on longstanding total parenteral nutrition (TPN). The provider orders the TPN to be discontinued. Shortly after the TPN is stopped, the patient becomes altered and combative. The nurse attributes the change in this patient to which condition?