A 62-year-old man has had CABG surgery and develops atrial fibrillation in the ICU afterward. He is administered an amiodarone loading dose with a planned maintenance dose to follow. Which of the following hemodynamic effects is MOST likely to occur during the acute bolus phase?

A) Decreased systemic vascular resistance
B) Decreased pulmonary vascular resistance
C) Increased systemic vascular resistance
D) Increased pulmonary vascular resistance