After teaching a client who has an Implantable cardioverter-defibrillator (ICD), a nurse assesses the client's understanding. Which statement by the client indicates a correct understanding of the teaching?

A. "I would wear a snug-fitting shirt over the ICD": Wearing tight or restrictive clothing over the ICD site can cause discomfort, skin irritation, or interfere with proper healing after implantation. Clients are usually advised to wear loose-fitting clothing to reduce pressure on the device and allow for proper skin care. B. "I will avoid sources of strong electromagnetic fields": Strong electromagnetic fields, such as those from MRI machines, large industrial motors, or certain security systems, can interfere with ICD function by triggering inappropriate shocks or inhibiting proper pacing. Avoiding these sources demonstrates correct understanding of ICD safety precautions and device malfunction. C. "Now I can discontinue my antidysrhythmic medication": ICD implantation does not automatically eliminate the need for prescribed cardiac medications. Antidysrhythmic drugs or other cardiac therapies may still be required to manage underlying arrhythmias and reduce the risk of further cardiac events. Discontinuing medication could be dangerous. D. "I would participate in a strenuous exercise program": Strenuous or contact activities can dislodge leads, damage the device, or trigger arrhythmias. Post-implantation activity should be gradually resumed according to the provider’s recommendations, and high-intensity exercise is generally restricted initially. This indicates a misunderstanding of safe activity levels.