An implantable loop recorder (ILR) is a device that is implanted under the skin in the right chest area. It is used to monitor your heart rhythm. When you have palpitations (irregular heartbeats), pass out or experience other symptoms, you simply use a button or activator to start the recorder. You can only store three to five events depending on how your device is set up. After that you need to come to the clinic to have the information downloaded for your physician to review. The device will last about 18 months.

What does it tell the doctor?
A doctor uses an implantable loop recorder to evaluate syncope (fainting or passing out) or rapid heart beats with severe symptoms. Most people who receive an ILR have already worn Holter and event monitors, but have not been able to obtain recordings at the time of the symptoms.

What happens before the procedure?
You should not eat or drink anything after midnight the night before your ILR is implanted. You will have the procedure and risks explained to you beforehand and will sign a consent form. Be prepared to have someone drive you home after the procedure.

What will I experience?
Having an ILR implanted is an outpatient procedure that takes place in the electrophysiology lab. You will be given a medication to numb the area where the incision will be made and the device placed. The device is about the size of a disposable lighter. There are no wires or leads to the heart.

What should I do after I have activated the device?
Call the clinic for an appointment to have the information retrieved. Remember, once the pre-determined limit of events stored has been reached, the device will not store any further events until the information is retrieved.

When is the device removed?
It is usually removed when the battery runs out or after your doctor has made a diagnosis or decided on a treatment. Your doctor will discuss this with you.