Hartman's Complete Guide for the EKG Technician Clear, concise, and up-to-date, Hartman's Complete Guide for the EKG Technician will help students master the skills and knowledge they need to pass EKG technician certification exams and to excel on the job. Unlike many EKG interpretation texts, this book is written specifically for students taking EKG technician courses or working toward EKG technician certification.