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 12-lead electrocardiogram (ECG) is a noninvasive diagnostic test used to assess the heart’s electrical activity and identify dysrhythmias, ischemia, and other cardiac abnormalities. Accurate interpretation depends on proper electrode placement and minimizing artifacts caused by movement or muscle activity. Patient preparation is essential to ensure clear waveform recordings and reliable results. Nursing care focuses on positioning, comfort, and instruction to reduce interference during the procedure. Rationale: A. Instructing the client to remain as still as possible during the recording is essential to obtain an accurate ECG tracing. Movement, talking, or muscle tension can create artifacts that distort the electrical signals and make interpretation difficult. Stillness ensures that the recorded cardiac activity reflects true electrical conduction of the heart. B. Telling the client to expect a mild stinging sensation during the test is incorrect because a 12-lead ECG is a completely noninvasive and painless procedure. The electrodes only detect electrical activity and do not deliver any electrical current to the body. Clients may feel adhesive from the electrode pads but should not experience pain or discomfort. C. Assisting the client to the orthopneic position is not appropriate for obtaining a standard 12-lead ECG. The preferred position is supine or semi-Fowler’s to ensure accurate electrode placement and consistent recordings. Orthopneic positioning is typically used to improve breathing in clients with respiratory distress, not for ECG acquisition. D. Attaching a blood pressure cuff to the client’s upper arm is not required for a standard 12-lead ECG. ECG monitoring focuses on electrical activity through skin electrodes placed on the chest and limbs. A blood pressure cuff may be used for vital sign monitoring but is not part of the ECG setup procedure.