A physical therapist is treating a patient with heart failu…
A physical therapist is treating a patient with heart failure who was admitted to the hospital with volume overload. The patient received 5 days of aggressive diuresis with furosemide (Lasix). While the patient has no known baseline cardiac arrhythmias, they complain of palpitations during ambulation, which appear to correlate with frequent PVCs on their monitor. Which of the following lab value conditions would most clearly explain these observations?