Which finding is expected in the patient with diabetic ketoacidosis (DKA)?

The 50-year-old previously healthy patient complains of shortness of breath, especially on exertion or when laying down to sleep. She takes over-the-counter allergy medicine for seasonal allergies and melatonin to help her sleep sometimes. Her vital signs are heart rate of 64 bpm, respirations 22, oxygen saturation 99%, and blood pressure 114/68 mmHg. Her assessment is notable for crackles over the bilateral lung bases and a moderate diastolic apical murmur. The nurse prepares the patient for which initial tests? Select all that apply. 

The patient first experienced chest pain 12 hours ago and was diagnosed with a myocardial infarction. The patient’s myoglobin level is noted to be roughly 5 times the normal level. The nurse makes which prediction about the patient’s myoglobin level in 12 hours from the current level?