Fast Heart Rate

Overview

A normal heart rate for a healthy adult is between about 60 and 100 beats per minute. Heart rates of more than 100 beats per minute (tachycardia) can be caused by:

Exercise or stress. This fast heart rate usually returns to normal range (60 to 100 beats per minute) with rest and relaxation.
Illnesses that cause fever. When the cause of the fever goes away, the heart rate usually returns to normal.
Dehydration. When the dehydration is treated, the heart rate usually returns to normal.
Medicine side effects. This includes some asthma medicines.
Smoking, alcohol, caffeine, or other stimulants, such as diet pills.
Cocaine, amphetamines, and methamphetamines.

Babies and children younger than 2 years old have higher heart rates because their body metabolism is faster. Heart rates decrease as children grow, and usually by the teen years the heart rate is in the same range as for an adult.

A fast heart rate may be caused by a more serious health problem. A heart problem or other medical conditions may sometimes cause a fast heart rate. A fast heart rate may cause palpitations, chest pain or pressure, shortness of breath, dizziness, lightheadedness, or fainting.

Heart rhythm problems that cause a fast heart rate include atrial fibrillationatrial fibrillation and supraventricular tachycardia (SVT)supraventricular tachycardia (SVT).

If you have heart disease or heart failure, or if you have had a heart attack, be sure you understand the seriousness of a change in your heart rate or rhythm.

Current as of: July 31, 2024

Author: Ignite Healthwise, LLC StaffIgnite Healthwise, LLC Staff

Clinical Review BoardClinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

This information does not replace the advice of a doctor. Ignite Healthwise, LLC, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of UseTerms of Use. Learn how we develop our contenthow we develop our content.

To learn more about Ignite Healthwise, LLC, visit webmdignite.comwebmdignite.com.

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