According to previously defined procedures and upon request of a physician, operates electrocardiographic equipment, cardiac event monitor equipment, and stress testing equipment to record and/or analyze the electrical impulses of the heart, for physician use in the diagnosis of heart disorders. * Operates computer systems, performs clerical duties including data entry, billing, order review/entry, chart review, EKG review, Alerts appropriate staff of critical arrhythmias and abnormalities, billing and charting errors.