Intravenous (IV) Therapy Practice Exam: Comprehensive Practice Test and Study Guide

Monitoring cardiac rhythm and vital signs after administering potassium intravenously is critical due to the potential effects potassium can have on the cardiovascular system. High levels of potassium, known as hyperkalemia, can lead to serious cardiac complications such as arrhythmias. Monitoring involves keeping an eye on the patient's heart rate, rhythm, and blood pressure, as these can change significantly with fluctuations in potassium levels.

Furthermore, it's essential to assess vital signs as they can indicate how well the body is tolerating the potassium infusion, especially since rapid administration or too high a concentration can lead to adverse effects. Therefore, ensuring that these parameters remain stable after potassium administration is a key nursing responsibility to prevent potential life-threatening complications.