I am fairly new to the Telemetry floor...I cared for a pt who is in a-fib, had a cardioversion and came back to the floor in sinus rhythm during the am shift. When I came on for the evening shift, her STs were alarming in all leads. I ordered a 12 lead which showed no acute changes. The cardiologist said I could shut off her ST alarms in the tele mtr...here is my question, why were STs alarming if there was no acute change on the 12 lead. Thx in advance....FYI this floor stresses me out!