Have you or someone in your family, especially a young child, ever experienced a sudden, unimaginably fast heart rate? Or were you a little scared when a doctor told you the name `(Junctional Tachycardia)`? Don't worry. This is a rare condition, but once you understand it simply, you will feel a great sense of relief. Let's talk about it in detail today.
What is `(Junctional Tachycardia)`? To put it very simply...
Simply put, `(Junctional Tachycardia)` is a condition in which the rhythm of our heart, that is, the pattern of our heart beating, is a little different, and it happens faster. To be precise, what happens here is that the heartbeat does not start from the right place, but starts from a different place and starts to run faster.
Imagine, our heart has an electrical system. This is what gives the heart the signal to beat at the right time. Normally, this signal starts from a small place called the `(Sinoatrial node)` at the top of the heart. It's like the main switch in our house. From there, the electrical message travels throughout the heart and causes the heart muscle to contract and beat. We call this `(Normal Sinus Rhythm)`.
However, sometimes if something happens to this `(Sinoatrial node)`, it cannot work properly. Just like a substitute actor in a play when the main actor is sick, another place in the heart, that is, the `(Atrioventricular node)` located between the upper and lower chambers of the heart (this can also be called the "junction" of the heart), takes over the responsibility of starting the heartbeat. In this way, the heart beating rapidly starting from the junction of the heart is called `(Junctional Tachycardia)`.
Normally, when we are at rest, our heart beats between 60 and 100 times per minute. However, in someone with ``Junctional Tachycardia``, the heart beats more than 100 times per minute, sometimes much faster.
What are the main types of `(Junctional Tachycardia)`?
This heart rhythm abnormality can occur in two main ways.
1. Primary or Congenital (Junctional Tachycardia)
This is the rarest type. Some babies can have this condition at birth. If this happens, the lower chambers (`ventricles`) of the baby's heart can beat at a very high rate, around 200 to 250 times per minute. This is a very serious condition.
2. Secondary or Postoperative (Junctional Tachycardia)
This is the most common type. It can occur, especially in young children who have a congenital heart problem after surgery to correct it. For example, some babies who have surgery to correct a heart condition called Tetralogy of Fallot may develop this condition. It can occur in between 5% and 11% of children who have surgery.
Is `(Junctional Tachycardia)` a `(SVT)`?
Yes, `(Junctional Tachycardia)` is a type of `(SVT)`. `(SVT)` stands for `(Supraventricular Tachycardia)`. That is, a fast heartbeat that starts in the upper chambers of the heart (above the `Ventricles`).
Who is affected the most by this situation?
Junctional Tachycardia is very rare in adults. However, it is more common in infants and young children. As mentioned earlier, it can occur due to a congenital cause (which is very rare) or after heart surgery.
What are the symptoms? How do we recognize them?
Sometimes this condition can be present without any symptoms. But if symptoms do appear, they can include:
- Palpitations : It may feel like someone is running inside your chest, or like your heart is skipping a beat or two.
- Dizziness : You may feel dizzy and have difficulty standing.
- Fainting : You may suddenly lose consciousness and fall.
- Feeling very tired : You may feel so tired that you can't do anything.
If these symptoms are present, especially in a young child, it is very important to seek medical advice immediately.
What are the causes of `(Junctional Tachycardia)`?
There are several reasons that can interfere with the ``Sinoatrial node`` in our heart to properly generate electrical signals. This is why ``Junctional Tachycardia`` occurs.
For example, this condition can occur due to toxicity of the drug `(Digoxin)` (brand names `Cardoxin®` or `Digitek®`).
Here are a few other reasons:
- Myocarditis : Inflammation of the heart muscle.
- A heart attack.
- Heart valve replacement or other heart surgery.
- Congenital heart disease : This is a rare cause.
- Catheter ablation is a treatment for another heart rhythm disorder.
- Lyme disease .
How to recognize `(Junctional Tachycardia)`?
The main test to diagnose this condition is the `(Electrocardiogram - ECG)`. This records the electrical activity of the heart. A person with `(Junctional Tachycardia)` will have an ``P wave`` missing from the ``ECG``. This ``P wave`` is the signal that the heart starts beating from the `(Sinoatrial node).``
In addition to the ECG, your doctor will take your complete medical history. He or she may also order additional tests, such as blood tests and an echocardiogram, which is an ultrasound of the heart.
How is it treated?
Treatment depends on the cause of the condition and your symptoms. If the abnormal rhythm started after heart surgery, your doctor may:
- Correcting an electrolyte imbalance in the body.
- Check to see if you have a fever and, if so, treat it.
- Prescribing medication to slow the heart rate.
There are other treatments:
- Medications to slow the heart rate or restore it to a normal rhythm, such as `(Amiodarone)` (brand names `Cordarone®` or `Pacerone®`), may be given.
- Treatment methods called `(Catheter ablation)` or `(Cryoablation)` are either. In this, a catheter is inserted into the area of the heart that is causing irregular electrical signals and destroys that area. `(Cryoablation)` is a method that uses extreme cold.
- Overdrive atrial pacing: An attempt to restore the heart's rhythm to normal using an external device, such as a pacemaker.
Are there any complications in the treatment?
After `(Catheter ablation)` treatment, sometimes this abnormal rhythm can come back. Also, with `(Catheter ablation)` in adults, there is a risk of `(Atrioventricular block)` (that is, a blockage of the next conductor that carries the electrical signal after the `(Sinoatrial node)`). Because this risk is low, doctors sometimes use the `(Cryoablation)` method. If `(Ablation)` treatment is not successful after about two times, you may also need to have a `(Pacemaker)` (a small device that controls the heartbeat) implanted.
How long does it take to recover from these treatments?
Usually, after a catheter ablation, you can go home and resume your normal activities right away. However, you may need to wait a few days before doing any strenuous activities. Your doctor will give you specific instructions about this.
Can the risk of `(Junctional Tachycardia)` be reduced?
Doctors can reduce the risk of developing Junctional Tachycardia by giving certain medications before or during surgery. For example:
- `(Magnesium)`
- `(Propranolol)` (brand names `Inderal®XL` or `InnoPran®XL`)
- `(Dexmedetomidine)` (This is sometimes used during heart surgery on young children)
What can someone with `(Junctional Tachycardia)` expect?
Once the cause of this abnormal rhythm is found and treated, the symptoms will gradually improve. However, you will need to stay in the hospital until your ``Junctional Tachycardia`` condition improves.
The outcome (`Outlook`) of this condition varies from type to type.
- Primary or Congenital Junctional Tachycardia is a difficult condition to treat. It can also lead to serious conditions such as heart failure, complete heart block, and ventricular fibrillation. If left untreated, the risk of death is about 9%. However, if this rhythm is detected after the first six months of life, the outcome is much better.
- Secondary or Postoperative Junctional Tachycardia usually occurs two to three days after surgery, but often resolves within a week. It can cause low blood pressure, dizziness, and loss of consciousness.
When should I see the doctor?
You should see your doctor for a follow-up appointment in two weeks after you go home from the hospital. You should also continue to receive treatment for the underlying condition that caused the junctional tachycardia.
When should I go to the emergency room (ER)?
If you have had a catheter ablation, seek medical advice immediately if you develop any of the following symptoms at the site of the catheter insertion (usually the groin):
- If it suddenly swells.
- If the bleeding does not stop even after pressing and holding it.
What questions should I ask my doctor?
When you find out that you or your child has this condition, it's normal to have a lot of questions. Don't be afraid to ask your doctor about these things:
- What type of Junctional Tachycardia does my child/I have?
- What is the best treatment for my condition?
- Is there a chance that my other children will also develop this condition?
If your child has Junctional Tachycardia, ask your doctor about the symptoms and understand them. Then, if something like this happens again, you can recognize it quickly. Don't be afraid to ask questions about the treatment your child is receiving and the risks involved. Being aware of all of this will help you make the best decisions for your child's well-being.
Finally, things to remember (Take-Home Message)
Don't be scared when you hear the name `(Junctional Tachycardia)`. This is a problem with the heart's rhythm, but:
- This can be identified. This can be detected through tests like `ECG`.
- There are treatments. Depending on the cause, it can be controlled with medication or methods like ``(Ablation)``.
- The type that occurs, especially after surgery, is often temporary. It will get better in a few days.
- Talk openly with your doctor. Talk to your doctor about all your questions and fears and feel at ease.
The most important thing is to remember that you are not alone. Doctors and healthcare staff are always ready to help you.
Wishing you and your family good health!
` Heartbeat, Heart Disease, Tachycardia, Pediatric Heart Disease, ECG, Cardiac Surgery, Junctional Tachycardia
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