fibrillation
noun
fi·bril·la·tion
ˌfi-brə-ˈlā-shən 
ˌfī-
ˌfī-
1
: an act or process of forming fibers or fibrils
2
a
: 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
The device recorded Hackman was experiencing atrial fibrillation, an irregular heart rhythm.
—
Dalia Faheid, CNN, 8 Mar. 2025
Take atrial fibrillation, or AFib, an irregular heartbeat that can raise the risk of blood clots, stroke, heart failure, and other complications.
—Korin Miller, SELF, 7 Mar. 2025
February 18 Hackman's pacemaker recorded atrial fibrillation.
—Hannah Parry, Newsweek, 8 Mar. 2025
But researchers were surprised by the reduction in atrial fibrillation risk.
—Tom Gavin, EverydayHealth.com, 30 Jan. 2025
See All Example Sentences for fibrillation
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Dalia Faheid, CNN, 8 Mar. 2025
Take atrial fibrillation, or AFib, an irregular heartbeat that can raise the risk of blood clots, stroke, heart failure, and other complications.
—Korin Miller, SELF, 7 Mar. 2025
February 18 Hackman's pacemaker recorded atrial fibrillation.
—Hannah Parry, Newsweek, 8 Mar. 2025
But researchers were surprised by the reduction in atrial fibrillation risk.
—Tom Gavin, EverydayHealth.com, 30 Jan. 2025
See All Example Sentences for fibrillation
Cite this Entry
“Fibrillation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fibrillation. Accessed 27 Mar. 2025.
Copy CitationMedical Definition
fibrillation
noun
fi·bril·la·tion
ˌfib-rə-ˈlā-shən
ˌfīb-
ˌfīb-
1
: an act or process of forming fibers or fibrils
2
a
: 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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