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Tachycardia

Symptoms

Some people with tachycardia have no symptoms and are unaware of their condition until it is discovered incidentally by their doctor during a physical examination.

Tachycardia may result in these signs or symptoms:

  • Dizziness
  • Clamminess
  • Shortness of breath
  • Light-headedness
  • Rapid heartbeat
  • Chest pain
  • Palpitations, sensations of a racing, uncomfortable, irregular heartbeat or a flopping in the chest
  • Blackouts
  • Visual problems
  • Fainting (syncope)

Tachycardia may occur infrequently (paroxysmal tachycardia). Symptoms may come and go, lasting for a few minutes to hours and then stopping on their own. Chronic tachycardia occurs when symptoms last until they're treated medically.

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