Tachycardia

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Tachycardia Guide

Christine Jeffries

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Tachycardia Definition

Definition

Tachycardia is a rapid heart rate of more than 100 beats per minute. Sinus tachycardia, from the heart's sinus node, is a normal response to exercise, illness, or stress.

There are several types of abnormal tachycardias or arrhythmias . These can come from two places:

  • Atria (the two smaller chambers on the top of the heart)—called supraventricular tachycardias
  • Ventricles (the lower chambers of the heart)—called ventricular tachycardia

This condition can be life-threatening. But, it can be treated. If you think you or someone you know has this condition, get emergency help.

Electrical System and Chambers of the Heart

Nucleus fact sheet image
© 2009 Nucleus Medical Art, Inc.

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