@walkinggirl the zio patch is just a heart monitor your cardiologist orders for you that you stick to your chest and wear for a week or two. It is like a band aid in size. When you remove it and mail it to the lab in the provided envelope, the results are given to your cardiologist who interprets results and makes any decisions if needed based on your data. You only wear it if your cardiologist thinks you need to. I have worn it only a few times in the last few years.