Review Question - QID 210822

A 67-year-old man presents to the emergency department after a suicide attempt. The patient was found in his apartment by his grandson with wrist lacerations. He was rushed to the emergency department and was resuscitated en route. The patient has a past medical history of ischemic heart disease and depression. His pulse is barely palpable, and he is not responding to questions coherently. His temperature is 98.2°F (36.8°C), blood pressure is 107/48 mmHg, pulse is 160/min, respirations are 14/min, and oxygen saturation is 99% on room air. The patient is started on blood products, and his blood pressure improves to 127/55 mmHg after 3 units of blood. On physical exam, the patient complains of numbness surrounding his mouth and pain in the location of the lacerations of his wrists. Which of the following is the most likely laboratory finding that could be seen in this patient?