Examples of A-fib in a Sentence
Recent Examples on the Web
According to experts, a pulse measurement can underestimate the true heart rate of a patient in A-fib.
—
Lizzie Presser,
ProPublica,
14 Jan. 2026
Also known as A-fib, the condition is an irregular heart rhythm that begins in your heart’s upper chambers, per Cleveland Clinic.
—
Jordana Comiter,
PEOPLE,
23 Dec. 2025
More than 10 million Americans live with atrial fibrillation, or A-fib, a common heart disorder that causes heart palpitations and can lead to heart failure, blood clots and stroke.
—
Kaitlin Sullivan,
NBC news,
9 Nov. 2025
A-fib is an irregular, quivering or often rapid heart rhythm resulting from the heart’s upper chambers, the atria, beating out of sync with the lower chambers, the ventricles.
—
Kristen Rogers,
CNN Money,
27 Oct. 2025
Hogan had chronic lymphocytic leukemia and a history of atrial fibrillation, or A-fib, a condition in which the upper chambers of the heart, or atria, beat irregularly and often rapidly.
—
William Cornwell,
The Conversation,
1 Aug. 2025
While everyone isn't sensitive to the effects of alcohol on their heart rhythm, having certain conditions can increase your risk for A-fib after consuming alcohol.
—
Anna Giorgi,
Verywell Health,
6 Sep. 2024
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Lizzie Presser,
ProPublica,
14 Jan. 2026
Also known as A-fib, the condition is an irregular heart rhythm that begins in your heart’s upper chambers, per Cleveland Clinic.
—
Jordana Comiter,
PEOPLE,
23 Dec. 2025
More than 10 million Americans live with atrial fibrillation, or A-fib, a common heart disorder that causes heart palpitations and can lead to heart failure, blood clots and stroke.
—
Kaitlin Sullivan,
NBC news,
9 Nov. 2025
A-fib is an irregular, quivering or often rapid heart rhythm resulting from the heart’s upper chambers, the atria, beating out of sync with the lower chambers, the ventricles.
—
Kristen Rogers,
CNN Money,
27 Oct. 2025
Hogan had chronic lymphocytic leukemia and a history of atrial fibrillation, or A-fib, a condition in which the upper chambers of the heart, or atria, beat irregularly and often rapidly.
—
William Cornwell,
The Conversation,
1 Aug. 2025
While everyone isn't sensitive to the effects of alcohol on their heart rhythm, having certain conditions can increase your risk for A-fib after consuming alcohol.
—
Anna Giorgi,
Verywell Health,
6 Sep. 2024
Cite this Entry
“A-fib.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/A-fib. Accessed 6 Jul. 2026.
Copy CitationMedical Definition
A-fib
noun
variants
also AFib
or Afib
: atrial fibrillation
A-fib occurs when the top chambers of the heart, responsible for bringing blood back from the rest of the body, start to flutter.—Forbes
ForbesIndividuals who walked two to three miles per hour … had a 32 percent lower risk of developing AFib, whereas those who walked more than three miles per hour (moderate pace) lowered their risk by 41 percent.—Food & Fitness Advisor
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