An implantable loop recorder is a small device inserted under the skin over your chest that records your heart rhythm. It can monitor the electrical signals of your heart continuously for several years.
Your doctor may recommend an implantable loop recorder to get more conclusive results if other tests have failed. For example, some patients may have abnormal heartbeats (arrhythmias) or fainting spells intermittently. If these problems occur infrequently, a short duration test such as an electrocardiogram (ECG or EKG) may not catch these events. An implantable loop recorder allows for long-term heart rhythm monitoring to increase the chance of diagnosing a relatively infrequent heart rhythm disorder.