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
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Her medical visits piled up over the past few years as Ms. Epstein, a writer, was successfully treated for uterine cancer, recovered from a stroke and contended with atrial fibrillation.
—
Paula Span, New York Times, 5 Jan. 2025
Chronic atrial fibrillation is an irregular, frequently rapid heart rhythm originating in the atria.
—Colleen Doherty, Verywell Health, 2 Dec. 2024
Actor Hayes, 54, is living with AFib, or atrial fibrillation, a heart condition that causes an irregular and abnormally fast heart rate.
—Matt Robison, Newsweek, 21 Nov. 2024
Some risks associated with stroke are hypertension (high blood pressure), atrial fibrillation (an irregular heartbeat) and smoking, according to the US Centers for Disease Control and Prevention.
—Gina Park, CNN, 20 Nov. 2024
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Paula Span, New York Times, 5 Jan. 2025
Chronic atrial fibrillation is an irregular, frequently rapid heart rhythm originating in the atria.
—Colleen Doherty, Verywell Health, 2 Dec. 2024
Actor Hayes, 54, is living with AFib, or atrial fibrillation, a heart condition that causes an irregular and abnormally fast heart rate.
—Matt Robison, Newsweek, 21 Nov. 2024
Some risks associated with stroke are hypertension (high blood pressure), atrial fibrillation (an irregular heartbeat) and smoking, according to the US Centers for Disease Control and Prevention.
—Gina Park, CNN, 20 Nov. 2024
See all Example Sentences for fibrillation
Dictionary Entries Near fibrillation
Cite this Entry
“Fibrillation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fibrillation. Accessed 22 Jan. 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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