A nurse is caring for a client who has undergone electroconvulsive therapy (ECT). The nurse should monitor the client for which of the following adverse effects of ECT?

A. Voice alteration: ECT does not typically affect the vocal cords or larynx, so voice alteration is not an expected adverse effect. If present, it would likely be unrelated to the procedure and should be evaluated for another cause. B. Neck pain: Mild muscle soreness may occur due to muscle contractions during ECT, but neck pain is not a primary or significant adverse effect. It is generally transient and not a defining outcome of the therapy. C. Memory deficit: Short-term memory loss and confusion are common adverse effects of ECT. Clients may experience difficulty recalling events immediately before or after treatment, but memory typically improves over time as the brain adjusts post-therapy. D. Headache: Although headache can occur after ECT, it is considered a mild and temporary side effect rather than an adverse effect. It is usually managed with rest and mild analgesics, unlike memory impairment, which is more significant and characteristic of ECT.