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What Are the Signs and Symptoms of Heart Block?

Signs and symptoms depend on the type of heart block you have. First-degree heart block may not cause any symptoms.

Signs and symptoms of second- and third-degree heart block include:

  • Fainting
  • Dizziness or light-headedness
  • Fatigue (tiredness)
  • Shortness of breath
  • Chest pain

These symptoms may suggest other health problems as well. If these symptoms are new or severe, call 9–1–1 or have someone drive you to the hospital emergency room. If you have milder symptoms, talk with your doctor right away to find out whether you need prompt treatment.

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Updated: July 9, 2012