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?

Assist the client to the orthopneic position.

Instruct the client to remain as still as possible during the recording.

Attach a blood pressure cuff to the client's upper arm.

Tell the client to expect a mild stinging sensation during the test.