What it is and how it works: An implantable loop recorder (ILR) is a small heart monitor that is placed under the skin, usually on the left side of the chest, through a minor operation. It is used to record the electrical activity of the heart for up to three years and to detect any heart rhythm or rate irregularities. This information is then recorded and stored for your doctor to review. Once a diagnosis has been made, or the battery of the ILR has come to an end, the device will be removed in a similar way to when it was first implanted. Usually, the procedure to fit an ILR will take around 10 to 15 minutes.
What it detects: An implantable loop recorder may be recommended by your doctor if your symptoms cannot be explained after a routine ECG. These symptoms may include dizzy spells, blackouts, or palpitations.
