Problem: Jessie Brown had a total knee replacement done two days ago. She is scheduled to be discharged tomorrow. Today you notice that Jessie's telemetry monitor shows her heart rate at 115-120 beats per minute. Yesterday you noted that her heart rate was 82-86 bpm. He pulse oximetry is 89% and her respiratory rate is 26. She has no specific complaints. Jessie weighs 166 pounds.