fibrillation
n.n. a fast, irregular, and uncontrolled beating of the heart. It is a serious medical condition that can be life-threatening if not treated quickly.
n. a rapid, irregular, and uncoordinated contraction of the heart muscle, typically occurring in the atria or ventricles. It is a serious arrhythmia that can lead to cardiac arrest if not corrected.
The doctor checked for signs of heart fibrillation.
Emergency responders used a defibrillator to restore a normal heart rhythm after the patient suffered from ventricular fibrillation.
While atrial fibrillation is more common and often manageable with medication, ventricular fibrillation is a medical emergency that requires immediate electrical intervention to prevent sudden cardiac death.
From fibrilla + -ation.