What happens when... I get a Holter monitor?
A Holter monitor is a device that sticks onto your chest and measures your heart rhythm for a day or two. It doesn’t put any electricity into your body, it just measures the electricity your heart makes when it beats.
You’ll usually go to the cardiologist to have the monitor put on- this should be a short appointment, about 15 minutes. They’ll explain how to take care of the monitor, put it on, and that’s it
There are a few different types of monitor you might be given. The older kind has between 3 and 6 stickers on your chest with wires on them that connect to a box you wear on a lanyard or clipped to your clothes.
The newer ones have a small box on a sticky patch that goes directly on your chest. Depending on the style, it might be a square that goes under your left collarbone, or a longer strip that goes up the middle of your chest.
Especially for the newer monitors, they’re super sticky and the person putting it on will have to push firmly when putting it on. If you have sensitive skin or allergies to adhesives, you can have a patch test done ahead of time to see if you’ll be okay with the monitor. You likely won’t have to put a gown on to have the monitor put on, they’ll just have you lie back on the table and lift your shirt. If you’re wearing a tight sports bra or binder, you may need to take that off and change into a gown, but you can put it back on as soon as they’re done. You can’t get the monitor wet, so I would recommend taking your shower before your appointment. No lotion though, or the monitor won’t stick well.
Somewhere on the device, there will be a button for you to press when you notice symptoms. The doctor will look at all the information from the device, but pay extra attention to times where you pressed the button. You’ll also be asked to keep a record of anything you did while wearing that might have affected your heart rate, like exercising or watching a scary movie.
For the most part, you can just go about your regular day while wearing the monitor. Just try not to get too sweaty, and don’t schedule an MRI for while you’re wearing it. If it starts to peel, you can use medical tape to keep the edges down. A shirt with a high neckline will hide the device pretty well, although if you have a flat chest, the bump or wires will be more noticeable.
Once it’s been however long your doctor wants you to wear it, you can take the device off. It’s a lot stickier than your average band aid, so it helps to have an adhesive removing wipe or baby oil to loosen it. You’ll either have to drop the device off at the doctor’s office, or they’ll give you a box to mail it back.
You’ll find out about the results at a follow up appointment with your doctors, unless there’s something urgent, in which case they’ll contact you sooner. Some devices even send live information to your doctor so they can keep an eye out for anything that needs immediate help.
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