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Implantable loop recorders

An implantable loop recorder (ILR) is used to monitor heart rhythms for months at a time in people who don't experience symptoms very often. Some rhythm disturbances (arrhythmias) occur less frequently than others, making it difficult to detect them with ECG or 24-hour monitoring.

An ILR is a thin metal device (approximately the same size as a USB memory stick) that is surgically inserted just beneath the skin in the chest area. Once implanted, an ILR can determine whether symptoms are related to a heart rhythm problem.

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