ECG ( Electrocardiography)

Electrocardiography (ECG or EKG) is done to check the heartbeat. It shows how fast or how slow the heart is beating. ECG test results can help your care team diagnose:

  • Irregular heartbeats, called arrhythmias.
  • A previous heart attack.
  • The cause of chest pain. For example, it may show signs of blocked or narrowed heart arteries

An ECG also may be done to learn how well a pacemaker and heart disease treatments are working.

You may need an ECG if you have:

  • Chest pain.
  • Dizziness, lightheadedness or confusion.
  • Pounding, skipping or fluttering heartbeat.
  • Fast pulse.
  • Shortness of breath.
  • Weakness or fatigue.
  • Reduced ability to exercise

If you have a family history of heart disease, you may need an electrocardiogram to screen for heart disease, even if you don't have symptoms. Most heart doctors consider an ECG as a basic tool to screen for heart disease, although its use needs to be individualized.

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