A normal heart rate for a healthy adult is between 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, especially asthma medicines.
- Heavy smoking, alcohol, or too much caffeine or other stimulants, such as diet pills. Stopping the use of tobacco, alcohol, caffeine, or other stimulants may help your heart rate return to normal.
- 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 an adult's.
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, dizziness, light-headedness, or fainting. Atrial fibrillation is the most common type of fast heartbeat. It causes the heart's upper chambers to beat irregularly, reducing blood flow to the heart muscle and to the rest of the body.
Other Works Consulted
- Olgin JE, Zipes DP (2015). Specific arrhythmias: Diagnosis and treatment. In DL Mann et al., eds., Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 10th ed., vol. 1, pp. 748–797. Philadelphia: Saunders.
- Page RL, et al. (2015). 2015 ACC/AHA/HRS guideline for the management of adult patients with supraventricular tachycardia: A report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines and the Heart Rhythm Society. Circulation. DOI: 10.1161/CIR.0000000000000311. Accessed September 23, 2015.
Primary Medical Reviewer William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Martin J. Gabica, MD - Family Medicine
E. Gregory Thompson, MD - Internal Medicine
Adam Husney, MD - Family Medicine
Specialist Medical Reviewer David Messenger, BSc, MD, FRCPC, FCCP - Emergency Medicine, Critical Care Medicine
H. Michael O'Connor, MD, MMEd, FRCPC - Emergency Medicine
Current as ofDecember 6, 2017
Current as of: December 6, 2017
Author: Healthwise Staff
Medical Review: William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Martin J. Gabica, MD - Family Medicine & E. Gregory Thompson, MD - Internal Medicine & Adam Husney, MD - Family Medicine & David Messenger, BSc, MD, FRCPC, FCCP - Emergency Medicine, Critical Care Medicine & H. Michael O'Connor, MD, MMEd, FRCPC - Emergency Medicine