A patient with chronic HF and atrial fibrillation is treated with a digitalis glycoside and a loop diuretic. To prevent possible complications of this combination of drugs, what does the nurse need to do? (Select all that apply): A. Monitor Serum K+ levels, B. teach the patient how to take a pulse rate, C. Keep an accurate measure of intake and output, D. Teach the patient about dietary restrictions of K+, E. Withhold digitalis and notify health care provider if pulse is irregular