Do you sometimes feel faint? Or does your heart beat so fast that you feel scared? But when you go to the doctor, an ECG doesn't show anything wrong at that time? This is a problem that many people have. So, today we are talking about a small but very important device that is used to detect abnormalities in the heartbeat that only occur from time to time.
What is this Implantable Loop Recorder (ILR)?
Simply put, it's a very small electronic device that's implanted under the skin of your chest. It's like a small pen drive. Its main function is to continuously monitor your heart rate and rhythm, and record any abnormalities.
It is used to detect rare changes in heart rhythm that are not picked up by heart tests (such as a Holter monitor) that are usually done twice a day. This device can be left in your body for up to three years . If the doctor gets the necessary information during that time, it can be removed earlier.
Why would a doctor recommend this device to you?
Your cardiologist may recommend an ILR for you if:
- If you have unexplained fainting or palpitations: This may help find the real cause if other tests have failed to find a cause.
- Detect rare heart rhythm abnormalities (arrhythmias): Some types of arrhythmias, such as ``Atrial Fibrillation - AFib``, do not occur frequently. This device is very useful in such cases.
- Monitor an already identified arrhythmia while it is being treated.
- Monitor the electrical activity of the heart after a heart attack or stroke.
How does this little gadget work?
Think of it as a little spy spying on your heart. It detects the electrical activity of your heart and records any abnormal changes. It's very small, about an inch or two long.
Because it is located under the skin (subcutaneous), you can see the lump above the skin, but you will not feel any pain or discomfort.
This device works in two ways:
1. Automatically: If this device detects an abnormality in your heart rhythm, even when you have no symptoms, it will automatically record the event.
2. Manually: You will receive a small activator that you can hold with this device. When you feel faint or your heart is beating fast, you just have to press the button on the activator. Then, the device will record your heart activity at that moment and a short time before. This will help the doctor understand the relationship between your symptoms and abnormal heart activity.
All this data is stored in its memory. It then makes that data available to your doctor at the appropriate time.
What happens before the device is installed?
First, your doctor will decide if you really need this device. To do this, they will review your medical history, perform a physical examination, and, if necessary, perform a few tests.
- `EKG` (Electrocardiogram)
- Echocardiogram (heart scan)
- `Exercise stress test` (a test done while exercising)
- `Tilt table test` (a test to check for dizziness)
If, after these tests, a clear cause for your symptoms cannot be found, an ILR may be recommended.
Your doctor will advise you on how to prepare for the procedure. You will usually feel slightly drowsy, so you will be asked to bring someone to drive you home after the procedure . It is not advisable to drive for 24 hours.
Is it a big deal to get this fixed? How is the procedure?
Not at all. This is a very simple, minor procedure. You can go home the same day. You won't be fully anesthetized, but you will be given medication to help you relax and not feel any pain.
This is usually done by a doctor who specializes in the electrical system of the heart (an ``Electrophysiologist''). The steps are as follows:
1. You will be given a sedative and a local anesthetic to numb the area so you don't feel any pain.
2. A very small incision is made in the skin on the left side of your chest.
3. A small space (pocket) is created under the skin to place the device.
4. The ILR device is inserted into that space.
5. The incision is closed with stitches or a special type of glue (`surgical glue`).
6. Finally, the device is activated by placing something like a magnet close to the chest.
This entire process takes a very short time, about 10 to 15 minutes .
What are the advantages and disadvantages of this?
As with any medical procedure, there are pros and cons. Your doctor will discuss this with you and make a decision.
| Benefits | Drawbacks |
|---|---|
| Long-term monitoring: Heart function can be monitored for a much longer period of time (up to 3 years) than other devices. This is a big advantage. | Minor surgery required: A minor procedure is required to fix it under the skin. |
| Automatic reporting: Even if you don't experience symptoms, this is automatically reported if you develop a heart problem. | Risk of infection: In rare cases, an infection may develop at the site of the device. If this happens, you will need to take antibiotics. |
| Convenience: Since it is inside the body, it does not interfere with your daily activities, such as bathing or swimming. It is also not visible from the outside. | Allergy: Some people may be allergic to a substance in this device. In that case, you may need to use a different monitoring method. |
No. This device will not harm your heart. It will not change your heart rate or give you an electric shock. It will only monitor your heart's electrical activity and record any changes.
What should I pay attention to after installing the device?
Most people can go home and resume normal activities the same day. Before you go home, your doctor will show you how to use the equipment that comes with the device. This includes the activator that you press when you have symptoms and the transmitter that sends data to your doctor.
You will also be given instructions on how to keep the incision clean. There may be some pain and bruising in the area for the first few days. This is normal. It will go away in a few days. The doctor will also tell you how long you should keep the area clean and dry.
If you have these symptoms, call your doctor immediately!
If you have any of these symptoms at the site of the device (the incision), tell your doctor immediately . These may be signs of an infection.
| Features to look out for |
|---|
| Redness or discoloration around the wound |
| swollen swelling |
| 🩸 Bleeding |
| 🟡 Leaking pus or other fluid |
How is this different from a pacemaker?
This is a very important question. These are two devices that perform two completely different functions.
- Loop Recorder (ILR): This is a diagnostic device. It's like a camera. It only records what's happening in the heart. It doesn't affect the heart in any way.
- Pacemaker: This is a `` treatment`` device. Like a doctor, it detects abnormalities in the heart's rhythm and sends electrical signals to correct them.
Simply put, the information from the Loop Recorder helps you decide whether you need a pacemaker or not.
Can this help identify a heart attack?
No. This device is not designed for that purpose. However, it can detect arrhythmias, which are a complication of heart attack.
Remember, a heart attack is a medical emergency. If you experience chest pain or other symptoms of a heart attack, do not wait for this device to report it. Go to a hospital's Emergency Department (ETU) immediately.
Finally, it's normal to feel frustrated when your symptoms don't show up on tests. But because an Implantable Loop Recorder monitors your heart for an extended period of time, your doctor is much more likely to "see" and pinpoint the problem. This could lead to the answers you've been looking for, and a quicker recovery.
Take-Home Message
- An Implantable Loop Recorder (ILR) is a small device that is implanted under the skin to monitor the heart's rhythm over a long period of time.
- This is mainly used to find the cause of unexplained fainting spells and palpitations.
- The installation process is very simple, quick, and low-risk.
- This device only records data; it does not treat or affect the heart in any way.
- If you notice any signs of redness, swelling, or pus at the site of the device, notify your doctor immediately.
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