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
Higher doses of fish oil may increase the risk of atrial fibrillation.
—
Amy Brownstein, Verywell Health, 6 May 2025
Weed has also been linked to cardiac arrhythmias such as atrial fibrillation; myocarditis — an inflammation of the heart muscle — spasms of the heart’s arteries and a higher risk of heart failure.
—Sandee Lamotte, CNN Money, 5 May 2025
The legacy way to treat conditions such as atrial fibrillation used extreme heat (radiofrequency ablation) or cold (cryoablation).
—Kevin Stankiewicz, CNBC, 16 Apr. 2025
This machine learning approach requires large bio-signal datasets in which instances of atrial fibrillation are labeled.
—Eloy Geenjaar, The Conversation, 10 Apr. 2025
See All Example Sentences for fibrillation
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Amy Brownstein, Verywell Health, 6 May 2025
Weed has also been linked to cardiac arrhythmias such as atrial fibrillation; myocarditis — an inflammation of the heart muscle — spasms of the heart’s arteries and a higher risk of heart failure.
—Sandee Lamotte, CNN Money, 5 May 2025
The legacy way to treat conditions such as atrial fibrillation used extreme heat (radiofrequency ablation) or cold (cryoablation).
—Kevin Stankiewicz, CNBC, 16 Apr. 2025
This machine learning approach requires large bio-signal datasets in which instances of atrial fibrillation are labeled.
—Eloy Geenjaar, The Conversation, 10 Apr. 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 16 May. 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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