A nurse is teaching a new RN about the use of electroconvulsive therapy (ECT) for the treatment of bipolar disorder. Which of the following statements by the new RN indicates understanding?

"ECT is contraindicated for clients who have suicidal ideation."

"ECT is prescribed to prevent relapse of bipolar disorder."

"ECT is effective for clients who are experiencing severe mania."

"ECT is the recommended initial treatment for bipolar disorder."