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The implantable loop recorder (ILR) is a subcutaneous, single-lead, electrocardiographic (ECG) monitoring device used for diagnosis in patients with recurrent unexplained episodes of palpitations or syncope, for long-term monitoring in patients at risk for or with documented atrial fibrillation (AF), and for risk stratification in patients who have sustained a myocardial infarction (MI) and those who have certain genetic disorders.Surgery usually takes 1 - 2 hours. Most patients are discharged the same day, but an overnight stay can last 1 – 2 days. An implantable loop recorder, unlike a pacemaker, does not have wires directly into the heart, so it does not present a risk from that standpoint and is safe.
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