What is an insertable cardiac monitor (ICM)?

An insertable cardiac monitor (ICM) is another name for an implantable heart monitor, injectable cardiac monitor, or loop recorder. An insertable cardiac monitor is a small medical device that can watch your heart for abnormal heart rhythms over time. It is sometimes called a loop recorder because it is continuously recording the heart rhythm, or on a loop. If it finds something abnormal, it saves the recording and sends it to the doctor or care team.

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