A nurse is caring for a client who has major depressive disorder and is scheduled for electroconvulsive therapy (ECT). The client's spouse asks the nurse about the possible side effects of the ECT. Which of the following responses should the nurse make?

"The most common side effects are directly related to the use of anesthesia."

The main side effects are temporary, and may include mild confusion, a headache, and short-term memory loss."

"Most clients have no adverse effects to this treatment, but muscle cramping may result from the induced seizure."

"Some clients have been known to have a myocardial infarction, but we will monitor your spouse closely to be certain this does not happen."