Question: The nurse is caring for a client with a myocardial infarction who is scheduled for a stress test (treadmil test), Before the procedure, the nurse obtains a cardiac rhythm strip that shows sinus bradycardia. Which statements correctly support this rhythm interpretation? Select all that apply. A Apical heart rate is 58. B. The AV node is firing as the pacemaker. C. The SA node is firing as the pacemaker D. Conduction is slowed in the bundle of His. E The Purkinje fibers are the primary source for this rhythm