HealthSheets™


Treatment for Left Bundle Branch Block

Left bundle branch block is a problem in the heart’s electrical system. It causes the left lower chamber (ventricle) of the heart to pump more slowly than normal. It doesn’t usually occur in young or healthy people. It’s more common in older adults and people with serious heart disease. It can worsen the heart’s ability to pump in people with heart failure.

Types of treatment

If you have no symptoms or other heart problems, you may not need treatment. If you have symptoms or other heart problems, you may need treatment such as:

  • Pacemaker. A device is put into your chest to help your heart pump normally.

  • Cardiac resynchronization therapy (CRT). A special pacemaker device is put into your chest. It helps the lower chambers of the heart (ventricles) pump normally. CRT may be used if you have heart failure and left bundle branch block.

Possible complications of left bundle branch block

People with no symptoms and no other heart problems are unlikely to have complications. In other cases, complications may include:

  • Heart failure

  • Heart that stops beating (cardiac arrest)

  • Death

Living with left bundle branch block

You can help manage your condition. Make sure to:

  • Tell all of your healthcare providers you have this heart condition.

  • Keep track of your symptoms carefully.

  • See your healthcare provider regularly, even if you don’t have symptoms.

  • Control your blood fat (lipid), blood sugar, and blood pressure levels.

  • Eat heart-healthy foods.

  • Limit the amount of salt in your diet.

  • Be physically active.

  • Quit smoking, if you smoke.

When to call 911

Call 911 if you have any of these:

  • Chest pain

  • Fainting

  • Severe trouble breathing

When to call your healthcare provider

Call your healthcare provider if you have either of these:

  • Symptoms that gets worse

  • New symptoms

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