question: Q:A 31-year-old nurse presents to the emergency department with palpitations, sweating, and jitteriness. She denies chest pain, shortness of breath, and recent illness. She states that she experienced weakness in her arms and legs and a tingling sensation in her fingers before the palpitations occurred. Medical and surgical history is unremarkable. Her mother has Grave’s disease. The patient has been seen in the ED multiple times for similar symptoms and was discharged after appropriate medical management. Today, her temperature is 37°C (98.6°F), blood pressure is 128/84 mm Hg, pulse is 102/min and regular, and respirations are 10/min. On examination, the patient appears diaphoretic and anxious. Her pupils are dilated to 5 mm. The rest of the examination is normal. Urine toxicology and B-HCG are pending. Which of the following is the next best step in management?? 
  {'A': 'TSH levels', 'B': 'Urine metanephrines', 'C': 'D-dimer levels', 'D': 'Fingerstick blood glucose', 'E': 'Echocardiogram'},