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Implantable loop recorder (ILR)

Implantable HEART RHYTHM MONITOR

An ILR is a small device that is implanted under your skin to record your heart’s electrical activity

About

ILR is used to diagnose rare symptoms such as fainting (syncope), seizures, recurrent palpitations, or lightheadedness, which don’t happen often enough to be captured by a 24-hour heart monitor. The ILR device can be left in place for up to three years, enabling the heart to be monitored for an extended period of time.

Need to know

  • What happens icon plus

    An ILR is smaller than your little finger and fits under the skin of your chest, over your heart. The procedure to fit it is short and straightforward, meaning you will be treated as an outpatient or a day case. Your consultant will inject local anaesthetic to numb the skin below your left collarbone. They will then inject the device under the skin before closing the area, usually with surgical glue. The whole procedure takes about 20 minutes.
  • How to prepare icon plus

    Your consultant will explain the procedure to you and answer any questions you might have. They'll let you know if you need to avoid eating, drinking or certain medications beforehand. Like all procedures, there may be some risks or side effects involved when implanting an ILR. Your consultant will explain these to you.
  • Afterwards icon plus

    After your ILR is fitted, your consultant cardiologist or physiologist will explain how it works. They'll also explain how to care for your chest while it heals. You should be able to go home the same day. Your consultant will let you know when you'll need to return for a follow-up appointment.

Our facilities

From complex surgery to straightforward procedures, we provide exceptional care across our network of hospitals, outpatient centres and specialist clinics.

  • London Bridge Hospital Facility

    London Bridge Hospital

    27 Tooley Street

    London

    SE1 2PR

    Appointments and Enquiries 020 7234 2009
    Imaging Appointments 020 7234 2773
    Switchboard 020 7407 3100

  • Wellington-south-hero-facility-582-582

    The Wellington Hospital

    Wellington Place

    London NW8 9LE

    Appointments 0207 483 5148
    Enquiries 020 3131 7478

  • facility-HSC-flag-hero-582x582

    The Harley Street Clinic

    35 Weymouth Street

    London

    W1G 8BJ

    Appointments 020 7034 8181
    Enquiries 020 3131 7962

Request an appointment

We're happy to help you make an appointment with one of our experienced consultants.

This content is intended for general information only and does not replace the need for personal advice from a qualified health professional.
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