USMLE® Step 1 style questions USMLE
A 65-year-old man comes to the emergency department because of abdominal pain and an altered mental status. He has a history of lung cancer, which is currently being treated with chemotherapy. His ECG tracing is obtained and shows shortened QT-intervals, as well as positive deflection at the junction of the QRS-complexes and ST-segments in leads V1-V6. Which of the following is the most likely electrolyte disturbance seen in this patient?