Answer to Question 1
A
Hypokalemia makes the myocardium more sensitive to digoxin. These levels should be monitored closely in patients taking furosemide, which can deplete potassium. Serum glucose, thyroid levels, and a CBC should be monitored if indicated by other conditions.
Answer to Question 2
B
This patient shows signs of systolic heart failure. Treatment for heart failure should begin with a loop diuretic, with an ACE inhibitor added after the diuretic has been taken. B-Blockers are used in patients with minimal fluid retention and would be added later. ARBs are used if ACE inhibitors are not tolerated or are ineffective.