Electrocardiogram ( ECG ) technicians use special equipment and medical techniques to record the electrical impulses transmitted by a patient's heart. Data acquired by electrocardiogram technicians assists physicians and cardiologists in diagnosing medical conditions in patients. An ECG technician, also called as cardiographic technician, uses electrocardiogram machines to run diagnostic tests to measure a patient’s heart rate, monitor cardiac rhythm. ECG technicians have, as their most basic qualities, aptitude for working with machines and interest in making people healthy. They must also be logical, precise and protective of confidential medical information. Beyond these, the most crucial skills for those who work as ECG technicians, according to Cheryl Passanisi, author of "Electrocardiography Essentials," are communication skills, both written and verbal. ECG technicians must communicate clearly and concisely with patients, doctors and other medical staff. They must also know the appropriate medical terminology to explain information accurately to patients.