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?

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

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

Assist the client to the orthopneic position.

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