Causes of Arrhythmia

What Causes Arrhythmia?

The direct cause of an abnormal heart rhythm is a breakdown in the heart’s electrical system. This breakdown can be caused by a number of conditions, including:

  • Heart disease, including coronary artery disease
  • Certain other diseases, including thyroid disease and anemia
  • High blood pressure
  • Fever or infection
  • Physical or emotional stress
  • Genetics (family history)

Arrhythmia can also be brought on by a host of substances, especially stimulants, including:

  • Caffeine
  • Tobacco
  • Alcohol
  • Cocaine
  • Amphetamines
  • Certain prescription and over-the-counter medications, including diet pills
  • Certain foods and herbs

Sometimes, however, the cause of an abnormal heart rhythm cannot be accurately determined.