Fast heart rate (tachycardia)

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Learn about different kinds of tachycardia (fast heart rate) and how tachycardia is treated.

Key points

  • Tachycardia is an abnormally fast heart rate.
  • During an episode of tachycardia, your child may feel dizzy, weak or uncomfortable, and the heart may beat more than 160 times per minute.
  • It is unusual for tachycardia to cause the heart to stop all of a sudden.
  • Tachycardia usually does not last long enough to cause serious damage.
  • There are many different types of tachycardia. Usually, they are caused by a problem with the heart's electrical system.
  • Treatment depends on what is causing the tachycardia.
Last updated: March 19th 2010