variants or less commonly AFib or Afib

Examples of A-fib in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Been hospitalized 3 times since June with A-fib. Scary. Matt Robison, Newsweek, 21 Nov. 2024 Related article Diet drinks may boost risk of dangerous heart condition by 20%, study says The rate of atrial fibrillation in the US is growing — estimates suggest up to 16 million people will have A-fib by 2050. Sandee Lamotte, CNN, 10 Oct. 2024

Word History

Etymology

by shortening

First Known Use

1988, in the meaning defined above

Time Traveler
The first known use of A-fib was in 1988

Browse Nearby Words

Cite this Entry

“A-fib.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/A-fib. Accessed 11 Mar. 2025.

Medical Definition

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
Individuals 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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