Sinus tachycardia

Sinus tachycardia
Sinus tachycardia
	ECG of a 29-year-old female with sinus tachycardia with a heart rate of 125 bpm
Specialty	Cardiology

Sinus tachycardia is a sinus rhythm of the heart, with an increased rate of electrical discharge from the sinoatrial node, resulting in a tachycardia, a heart rate that is higher than the upper limit of normal (90-100 beats per minute for adult humans).^[1]

The normal resting heart rate is 60–90 bpm in an average adult.^[2] Normal heart rates vary with age and level of fitness, from infants having faster heart rates (110-150 bpm) and the elderly having slower heart rates.^[3] Sinus tachycardia is a normal response to physical exercise or other stress, when the heart rate increases to meet the body's higher demand for energy and oxygen, but sinus tachycardia can also be caused by a health problem.

An elite athlete's heart recorded during a maximum effort workout maintaining over 180 bpm for 10 minutes.

^ Crawford, Michael H., ed. (2017). Current diagnosis & treatment cardiology (5th ed.). New York: McGraw-Hill Education. ISBN 9781259641268. OCLC 973336660.
^ MD, Howard E. LeWine (2011-12-21). "Increase in resting heart rate is a signal worth watching". Harvard Health. Retrieved 2022-04-05.
^ Jameson, J. N. St C.; Dennis L. Kasper; Harrison, Tinsley Randolph; Braunwald, Eugene; Fauci, Anthony S.; Hauser, Stephen L; Longo, Dan L. (2005). Harrison's principles of internal medicine. New York: McGraw-Hill Medical Publishing Division. pp. 1344–58. ISBN 978-0-07-140235-4.

[1] Crawford, Michael H., ed. (2017). Current diagnosis & treatment cardiology (5th ed.). New York: McGraw-Hill Education. ISBN 9781259641268. OCLC 973336660.

[2] MD, Howard E. LeWine (2011-12-21). "Increase in resting heart rate is a signal worth watching". Harvard Health. Retrieved 2022-04-05.

[principals-3] Jameson, J. N. St C.; Dennis L. Kasper; Harrison, Tinsley Randolph; Braunwald, Eugene; Fauci, Anthony S.; Hauser, Stephen L; Longo, Dan L. (2005). Harrison's principles of internal medicine. New York: McGraw-Hill Medical Publishing Division. pp. 1344–58. ISBN 978-0-07-140235-4.

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