A nurse is assessing a client who is scheduled to begin electroconvulsive therapy. Which of the following client health conditions should the nurse report to the provider?

Choice A reason: Diabetes mellitus is a chronic condition that can be managed during ECT with appropriate monitoring. It does not pose a direct contraindication to the procedure. Choice B reason: Kidney failure requires careful medication management but is not a direct contraindication to ECT. Adjustments can be made to anesthesia and fluid balance. Choice C reason: Congestive heart failure is a significant concern because ECT induces a brief period of increased cardiac workload due to seizure activity. This can exacerbate heart failure and lead to complications such as arrhythmias or decompensation. It must be reported to the provider for risk assessment and possible cardiology clearance. Choice D reason: Rheumatoid arthritis may affect positioning and comfort but does not interfere with the safety or efficacy of ECT. It is not a contraindication.