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Glossary: Electrocardiogram

An electrocardiogram, also called an EKG or ECG, is a simple, painless test that records the heart’s electrical activity.

An EKG shows:

  • How fast your heart is beating
  • Whether the rhythm of your heartbeat is steady or irregular
  • The strength and timing of electrical signals as they pass through each part of your heart

Source: NIH.gov

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