Implantable Loop Recorder

An implantable loop recorder, or ILR, is a heart monitoring device that works as an electrocardiogram (ECG) and records your heart rhythm continuously. The small device is placed under your skin, on your chest wall, overlying heart. It can capture information that a standard electrocardiogram (ECG or EKG) or Holter monitor misses because some heart rhythm abnormalities occur infrequently. It is used to look for the causes of fainting, palpitations, very fast or slow heartbeats, and hidden rhythms that can cause strokes.