A nurse is planning to obtain a 12-lead ECG for a client who has a history of cardiac dysrhythmias. Which of the following actions should the nurse plan to take?

A. Attach a blood pressure cuff to the client's upper arm: A blood pressure cuff is not involved in obtaining a 12-lead ECG. Although blood pressure may be assessed separately, it is not part of the ECG procedure itself and would not aid in capturing accurate cardiac electrical activity. B. Assist the client to the orthopneic position: The orthopneic position, which involves leaning forward, is used to ease breathing difficulties, not for ECG recording. For an ECG, the client should be lying flat or in a semi-reclined supine position to ensure consistent and accurate electrode placement. C. Tell the client to expect a mild stinging sensation during the test: A 12-lead ECG is a painless, non-invasive procedure. Electrodes are applied to the skin's surface to measure electrical activity; there should be no pain or stinging involved unless the skin is abraded during preparation. D. Instruct the client to remain as still as possible during the recording: Movement can cause artifacts on the ECG tracing, making it difficult to interpret accurately. Instructing the client to stay still helps ensure a clean recording and minimizes interference from muscle tremors or motion.