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What is tachycardia?

Tachycardia is defined by a heart rate over 100 beats per minute. There are three major types of tachycardia:
  • Atrial tachycardia (starting in the atria)
  • Supraventricular tachycardia (starting above the ventricles)
  • Ventricular tachycardia (starting in the ventricles)
Bijoy K. Khandheria, MD
Cardiology (Cardiovascular Disease)

Tachycardia is when a person’s heart rate accelerates, or is faster than normal.

Tachycardia can be benign, called sinus tachycardia. It can be in response to fever, low hemoglobin level, anxiety or excessive caffeine intake.

Other kinds of tachycardia occur when the electrical system of the heart has some problems.

Tachycardia is a heart-rhythm disturbance, or arrhythmia. An electrical signal in the heart causes a contraction of the heart muscle, which not only pumps blood but creates your heartbeat. A problem along this electrical pathway causes an abnormal heartbeat. Tachycardia refers to the heart beating too fast, more than 100 beats per minute.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.