Cardiology technologists operate electrocardiogram equipment and use medical imaging technologies to record cardiac activity of patients to aid in the diagnosis, monitoring and treatment of heart disease. Electrophysiological diagnostic technologists, not elsewhere classified, operate electroencephalographic, electromyographic and other electrophysiological diagnostic equipment to assist physicians in diagnosing diseases, injuries and abnormalities. Cardiology technologists and electrophysiological diagnostic technologists who are supervisors or instructors are included in this unit group.

• Cardiology technologists require completion of a two-year college diploma program in cardiology technology and supervised practical training.
  
• Cardiology technologists require registration with the Canadian Society of Cardiology Technologists in all provinces except Quebec.
  
• Electroencephalograph and other diagnostic technologists require completion of a two-year college or hospital-based program in electrophysiology technology and supervised practical training.
  
• Registration with the Canadian Board of Electroencephalograph Technologists is available for electroencephalograph technologists; it is required in Alberta and is usually required by employers in other provinces.
  
• Registration with the Association of Electromyography Technologists of Canada is available for electromyography technologists and is usually required by employers.
  
• Registration with l’Ordre des technologues en imagerie médicale, en radio-oncologie et en électrophysiologie médicale du Québec is required for cardiology technologists and electrophysiological technologists in Quebec.