ER Demand is a job title for a professional who works in the field of emergency medicine. This individual is responsible for managing and responding to emergency medical situations, such as trauma, cardiac arrest, and other life-threatening conditions. The job requires a high level of skill and knowledge in order to provide the best possible care to patients in need. The acronym STAT stands for 'IMMEDIATELY' or 'without delay, ' which is indicative of the urgency of the job.