After Receiving Change-Of-Shift Report on a Heart Failure Unit,which Patient

After receiving change-of-shift report on a heart failure unit,which patient should the nurse assess first?

A) Patient who is taking carvedilol (Coreg) and has a heart rate of 58
B) Patient who is taking digoxin and has a potassium level of 3.1 mEq/L
C) Patient who is taking captopril and has a frequent nonproductive cough
D) Patient who is taking isosorbide dinitrate/hydralazine (BiDil) and has a headache