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 reason: Voice alteration. Voice alteration is not a common adverse effect of ECT. The procedure typically does not impact vocal cords or speech directly. B reason: Neck pain. While discomfort and muscle soreness can occur, neck pain is not a primary or common adverse effect specifically associated with ECT. C reason: Memory deficit. Memory deficits, particularly short-term memory loss, are a well-documented adverse effect of ECT. Clients may experience difficulty recalling recent events before and after treatment. D reason: Headache. Headache can occur after ECT but is less concerning compared to cognitive side effects like memory deficits. Monitoring for memory changes is crucial.