Heart Block Child



This problem may be caused by:

  • A heart defect caused by genetics
  • Certain medicines
  • Damage from surgery
  • Infections, such as Lyme disease
  • Lupus in the mother
  • Electrolyte problems
  • Problems with the immune system

Risk Factors

Things that may raise the risk of this problem are:

  • Prior heart problems like heart failure or valve problems
  • Taking certain medicines
  • Exposure to toxins



Some children do not have symptoms. Others may have:

  • Lightheadedness
  • Fainting
  • Chest pain
  • Shortness of breath
  • Rapid or slow heartbeat
  • Weakness or lack of energy


The doctor will ask about your child’s symptoms and health history. A physical exam will be done.

The electrical activity of your child's heart may be tested. This can be done with an electrocardiogram (EKG) .



Treatment will depend on the type of heart block your child has. A first-degree heart block may not need treatment.

A pacemaker may be needed for some children with second-degree heart block and all children with third-degree heart block. The pacemaker will send regular electrical signals to the heart. It will keep the heart beating in a more efficient rhythm.


There are no known guidelines to prevent heart block.

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.