Review Question - QID 213242

A 78-year-old man presents with a 1-day history of increasing shortness of breath and difficulty lying down to sleep. His past medical history is significant for hypertension, myocardial infarction, and congestive heart failure. He denies chest pain and says that he has not noticed any other recent changes to his health. A physical exam is notable for inspiratory crackles on lung auscultation and 2+ pitting edema on the bilateral lower extremities. His physician increases the dose of one of his medications. If this medication acts upon a cotransporter that binds to both sodium and potassium, which of the sets of serum laboratory abnormalities in Figure A would most likely be seen in this patient?