AMCA EKG Exam – Electrocardiograph Technician Certification | American Medical Certification
1. What is the primary function of the sinoatrial (SA) node? A. To slow down the heart rate during sleep B. To act as the heart's primary pacemaker by generating electrical impulses C. To pump blood into the ventricles D. To prevent backflow of blood into the atria Correct Answer: B. To ac...
Updated: Tue, 24 Mar 2026 23:25:41 +0300