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 rarely causes symptoms.

Symptoms of second- and third-degree heart block include:

• Fainting
• Feeling dizzy or lightheaded
• Fatigue (tiredness)
• Shortness of breath
• Chest pain

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