This is a concise but straightforward study guide used by hundreds of students for the EKG national certification exam. Included in the book are: -Duties of an Electrocardiograph technician -General anatomy of the heart -Internal heart structure -Coronary Circulation -Heart physiology -Basic electrophysiology -Conduction system of the heart -Fundamentals of electrocardiogram -The electrocardiographic grid waves -Definition of waves, segments, intervals and junctions -The normal electrocardiograph waves and complexes -The normal EKG segments, intervals and Junctions -Analyzing the EKG strip -EKG interpretation and Pathology Recordings with diagrams -Artifacts of EKG Recording with diagrams - 400+ Practice Questions for the national certification Exam for EKG Technicians