fibrillation

noun
fi·​bril·​la·​tion | \ ˌfi-brə-ˈlā-shən How to pronounce fibrillation (audio) , ˌfī-\

Definition of fibrillation

1 : an act or process of forming fibers or fibrils
2a : a muscular twitching involving individual muscle fibers acting without coordination
b : very rapid irregular contractions of the muscle fibers of the heart resulting in a lack of synchronism between heartbeat and pulse

Examples of fibrillation in a Sentence

Recent Examples on the Web

New entrants, more focused on consumers than doctors, are emerging: Mr Campos points to Apple’s latest smart watch, which can detect atrial fibrillation, another sort of abnormal heart rhythm, and which shares all its data with its wearer. The Economist, "Hugo Campos has waged a decade-long battle for access to his heart implant," 12 Sep. 2019 Surgical treatment of AFib Atrial fibrillation, or AFib, affects more than 2.2 million Americans, and is an abnormal rhythm of the heart, which can cause the heart to pump less effectively. Trihealth, Cincinnati.com, "Common surgical heart treatments," 13 June 2019 Further Reading What is atrial fibrillation, and why is your watch telling you about it? Beth Mole, Ars Technica, "Apple continues health push with three new medical studies," 10 Sep. 2019 In November 2017, the company started the Apple Heart study, which looked at whether the pulse sensor on older Apple Watches (Series 1, 2, and 3) could help detect irregular heart rhythms, such as atrial fibrillation. Beth Mole, Ars Technica, "Apple continues health push with three new medical studies," 10 Sep. 2019 Two years ago Lamb, now 71, was dealing with atrial fibrillation (irregular heartbeat) and decided to back off from coaching at Boston English. Lenny Megliola, BostonGlobe.com, "Tom Lamb returning to Natick sidelines as an assistant," 28 June 2019 Now new oral anticoagulants are available that are just as effective as warfarin at preventing a stroke in people with atrial fibrillation and normal heart valves. Howard Lewine, sun-sentinel.com, "Stay on Coumadin or switch to a new blood thinner?," 14 Aug. 2019 Atrial fibrillation is a condition that causes an irregular and often rapid, heart rate. Kimberly Chin, WSJ, "Johnson & Johnson to Use Apple Watch App for Heart-Health Study," 17 Jan. 2019 Further Reading What is atrial fibrillation, and why is your watch telling you about it? John Timmer, Ars Technica, "A look at the Apple Watch’s ECG, from someone who needs it," 12 Dec. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fibrillation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of fibrillation

1845, in the meaning defined at sense 1

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Statistics for fibrillation

Last Updated

13 Oct 2019

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Time Traveler for fibrillation

The first known use of fibrillation was in 1845

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More Definitions for fibrillation

fibrillation

noun
fi·​bril·​la·​tion | \ ˌfib-rə-ˈlā-shən How to pronounce fibrillation (audio) , ˌfīb- How to pronounce fibrillation (audio) \

Medical Definition of fibrillation

1 : an act or process of forming fibers or fibrils
2a : a muscular twitching involving individual muscle fibers acting without coordination
b : very rapid irregular contractions of the muscle fibers of the heart resulting in a lack of synchronism between heartbeat and pulse — see atrial fibrillation, ventricular fibrillation

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More from Merriam-Webster on fibrillation

Rhyming Dictionary: Words that rhyme with fibrillation

Spanish Central: Translation of fibrillation

Nglish: Translation of fibrillation for Spanish Speakers

Britannica English: Translation of fibrillation for Arabic Speakers

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