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Implantable Loop Recorder (ILR)

Implantable Loop Recorder

An ILR is a slim, discreet device which is 4-5 cm long —that continuously monitors your heart’s rhythm. It is designed to detect and record irregular heartbeats (arrhythmias) over an extended period, especially when symptoms are infrequent or unpredictable OR detect rhythms that may cause you to faint.

The device is implanted just under the skin of your chest and can remain in place for years. It is similar in size to a small USB stick.

What happens after the procedure?

You will need regular follow-up appointments either in person or a remote monitoring service.

The ILR’s battery lasts between two to four years. Once it nears the end of its life, the device can be removed if you so wish. It cannot be recharged.

What Happens During the Procedure?

  • A canula or drip will be placed in your arm to allow the medical team to give medications.
  • You may receive an antibiotic through the IV to help prevent infection.
  • A local anaesthetic will be injected to numb the area where the device will be placed—usually just to the left of your breastbone.
  • Your cardiologist will make a small incision and insert the ILR under the skin.
  • The incision will be closed with dissolving stitches.

The procedure is quick and typically a day stay in hospital.

What are the risks?

While ILR implantation is safe and well-tolerated, some individuals may experience the following:

  • Bleeding or bruising at the site where the device is inserted.
  • Infection, which in rare cases may require the device to be removed.
  • Mild pain or discomfort around the area of implantation, usually temporary and manageable.

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