11 Exam for Cardiac Arrhythmias Posted onMarch 6, 2017AuthorJackie Compton Sorry, but you're not allowed to access this unit. Exam for Cardiac ArrhythmiasYou'll need to correctly answer at least 10 of the 15 questions below (at least 65%) to progress to the next unit.Question 1 of 15Answer Later...Question #1: Which pacemaker of the heart initiates normal sinus heartbeats? Atrio-ventricular node Suprachiasmatic nucleus Sinoatrial node Bundle of His node 0% « Previous Unit