A patient converts from normal sinus rhythm at 80 bpm to atr…
A patient converts from normal sinus rhythm at 80 bpm to atrial fibrillation with a ventricular response at 166 bpm. Blood pressure is 162/74 mm Hg. Respiratory rate is 20 breaths per minute, SpO2 98% on room air, with normal chest expansion and clear lungs bilaterally. IV Heparin and Cardizem (diltiazem) are given. The nurse caring for the patient understands that the reasons for prioritizing the Heparin and Cardizem are: