Ventricular Fibrillation | American Heart Association
https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia/ventricular-fibrillation
WebNov 15, 2022 · Ventricular fibrillation, or VF, is considered the most serious abnormal heart rhythm. VF is extremely dangerous and can lead to sudden cardiac death. Without treatment, the condition is fatal within minutes. Disordered electrical activity causes the heart’s lower chambers (ventricles) to quiver instead of contracting (or beating) normally.
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