Which action should NOT be taken before an EKG test?

Applying lotion to the skin should not be done before an EKG test because it can interfere with the quality of the electrical signals being recorded. Lotions or creams can create a barrier between the skin and the electrodes, potentially leading to inaccurate readings or poor contact.

In contrast, removing cell phones is a precaution to eliminate electromagnetic interference that could disrupt the EKG. Shaving excessive chest hair may be necessary to ensure the electrodes stay attached and function properly. Disrobing from the waist up is also required to ensure proper placement of the electrodes on bare skin. Therefore, avoiding lotion application is crucial for obtaining a clear and accurate EKG reading.