Arrhythmias in Children – Causes, Symptoms and Treatment Options


Arrhythmia is a medical condition characterised by irregular heartbeats or abnormal heart rhythms. It can manifest as the heart beating too fast (tachycardia), too slow (bradycardia), or with an irregular pattern. Arrhythmias can occur in people of all ages, including children. In paediatric cases, arrhythmias may be congenital (present at birth) or acquired due to underlying medical conditions or medications. Diagnosing and managing arrhythmias in children is essential, as they can lead to serious health issues and potentially life-threatening situations if left untreated. Treatment may include medication or medical procedures to restore a regular heartbeat.

The causes of arrhythmias in children can vary widely, encompassing congenital heart conditions, genetic factors, metabolic imbalances, infections, and the influence of certain medications or substances. Recognising the underlying cause is a crucial first step towards effective management. When it comes to symptoms, children may not always express their discomfort clearly, making it imperative for parents and healthcare providers to be vigilant and responsive.

With the right knowledge and timely intervention, parents can help their children lead healthy and fulfilling lives, even in the face of this cardiac challenge. This article aims to provide an overview of arrhythmias in children, including their causes, symptoms, diagnosis, and available treatment options.

Decoding Normal and Abnormal Heart Rate in Children

Arrhythmias refer to irregular heartbeats, which can occur in individuals of all ages, including children. While arrhythmias in children are rare, they can cause concern and require proper medical attention.

Normal heart rate

Infants and children: 110–120/min

Adolescents and adults: 60–80/min

Abnormal heart rate

When the heart rate goes above 200–220, it is abnormal.

Causes of Arrhythmias in Children

The causes of arrhythmias are –

    • Congenital Heart Conditions: Some children are born with structural abnormalities in their hearts, such as atrial septal defects, ventricular septal defects, or other congenital heart diseases. These conditions can disrupt the normal electrical pathways in the heart, leading to arrhythmias.
    • Genetic Factors: In some cases, arrhythmias can be caused by inherited genetic mutations that affect the heart’s electrical system.
    • Metabolic Imbalances: Certain metabolic disorders, such as electrolyte imbalances (e.g., low potassium or magnesium levels), can disrupt the heart’s electrical activity.
    • Infections: Viral infections, especially in the case of myocarditis (inflammation of the heart muscle), can lead to arrhythmias.
    • Medications and substances: Some medications and substances, both prescribed and recreational, can affect the heart’s rhythm. This includes certain antibiotics, asthma medications, and illicit drugs.
    • Trauma or Surgery: Heart surgery or trauma to the chest can disrupt the heart’s electrical pathways, causing arrhythmias.
    • Stress or Anxiety: Emotional stress or anxiety can trigger arrhythmias in some children.
    • Febrile Illness: High fevers associated with infections can sometimes provoke arrhythmias in susceptible children.

Symptoms of Arrhythmias in Children

The symptoms of arrhythmias in children can vary depending on the type and severity of the arrhythmia. Common symptoms may include

    • Dizziness or Lightheadedness – Arrhythmias can reduce blood flow to the brain, leading to dizziness, lightheadedness, or a feeling of near-fainting.
    • Palpitations- Children with arrhythmias may feel their heart racing, fluttering, or skipping beats. They might describe these sensations as “heart pounding” or “butterflies in the chest.”
    • Fainting (Syncope) – Some children may experience fainting episodes, often triggered by arrhythmias, as they can disrupt the normal circulation of blood.
    • Chest Pain or Discomfort – Some children may report chest pain or discomfort, although this is less common and often occurs with more severe arrhythmias.
    • Fatigue – Arrhythmias can cause the heart to work less efficiently, leading to fatigue and weakness, even with mild physical activity.
    • Shortness of Breath – Difficulty breathing or a sensation of breathlessness can occur during arrhythmia episodes.
    • Cyanosis – In severe cases where arrhythmias reduce the heart’s ability to pump blood effectively, a bluish tint to the skin (cyanosis) may be observed.
    • Irritability or Anxiety – Younger children may become irritable or anxious during arrhythmia episodes, although they may not be able to describe their symptoms.

Diagnosing Arrhythmias in Children

Doctors perform a few diagnostic tests to detect arrhythmic conditions. Here is the list of diagnostic tests:

    • Physical Examination
    • Electrocardiogram (ECG)
    • Holter Monitor
    • Event Recorder
    • Echocardiogram

Treatment Options for Arrhythmias in Children

Treatment options for arrhythmias depend on the type, severity, and underlying cause of the condition. Here are some common approaches:

    • Medication: Depending on the type and severity of the arrhythmia, a paediatric cardiologist may prescribe medications to regulate the heart’s rhythm.
    • Cardioversion: This procedure involves delivering an electric shock to the heart to restore normal rhythm.
    • Catheter Ablation: In this minimally invasive procedure, a catheter is guided to the heart to destroy abnormal electrical pathways causing arrhythmias.
    • Implantable Devices: In some cases, devices like pacemakers or implantable cardioverter-defibrillators (ICDs) may be implanted to regulate the heart’s rhythm.
    • Surgery: In cases where catheter ablation or device implantation is not feasible, surgical procedures like the Maze procedure may be considered to create scar tissue in the heart to redirect electrical signals.
    • Lifestyle changes: Dietary changes, exercise restrictions, and avoiding certain medications or substances may be recommended.

When to Consult a Doctor

You can also get in touch with the expert cardiology doctors at Narayana Healthcare based in your city to get immediate attention and medical support during injuries, health disorders or any other health concern.


Arrhythmias in children can be a cause for concern, but with prompt diagnosis and appropriate treatment, most children can lead normal, healthy lives. Parents and caregivers need to be vigilant about any unusual symptoms and seek medical attention when necessary. Regular follow-up with a paediatric cardiologist is crucial for managing arrhythmias in children effectively.


Q. What are the common causes of arrhythmias in children?
A. Common causes include congenital heart conditions, genetic factors, metabolic imbalances, infections, and certain medications or substances.

Q. What are the symptoms of arrhythmias in children?
A. Symptoms can vary, including palpitations, fatigue, dizziness or lightheadedness, chest pain, shortness of breath, and fainting spells (syncope).

Q. How are arrhythmias in children diagnosed?
A. Diagnosis involves a physical examination, an electrocardiogram (ECG), Holter monitor or event recorder tests, and sometimes an echocardiogram to evaluate the heart’s structure and function.

Q. What are the treatment options for arrhythmias in children?
A. Treatment options include medications, cardioversion, catheter ablation, pacemakers, implantable cardioverter defibrillators (ICDs), and sometimes surgical interventions, depending on the type and severity of the arrhythmia.

Approved and Reviewed by:

Narayana Health

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