Final answer:
The nurse should instruct the client to maintain their normal diet and exercise routine while using a Holter monitor to ensure an accurate recording of the heart's activity under typical conditions.
Step-by-step explanation:
The vital information the Ambulatory care nurse should provide to a client being prepared for a Holter monitor is to maintain their normal diet and exercise routine during the monitoring period. A Holter monitor is a device that continuously records the heart's rhythms for 24-48 hours, and it is important that the patient's usual lifestyle be maintained to capture an accurate representation of the heart's activity during typical daily activities.
It is unnecessary to check blood glucose specifically for the Holter monitoring unless advised for other health reasons. While the presence of electronic devices like microwaves and cell phones is unlikely to interfere with modern Holter monitors, the nurse may still advise avoiding close proximity to strong electromagnetic fields to ensure optimal functioning of the device. Reducing the exercise routine is generally not recommended as it may not reflect the patient's regular heart activity. If the patient experiences unusual symptoms or has specific restrictions, they should follow the guidance provided by their healthcare provider.