ventricular fibrillation
noun
: very rapid uncoordinated fluttering contractions of the ventricles of the heart resulting in loss of synchronization between heartbeat and pulse beat
—abbreviation VF, V-fib
Cite this Entry
“Ventricular fibrillation.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/ventricular%20fibrillation. Accessed 1 Dec. 2025.
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