Ventricular Fibrillation

**Semantic type:** Disease or Syndrome

**Definition:** A disorder characterized by an electrocardiographic finding of a rapid grossly irregular ventricular rhythm with marked variability in QRS cycle length, morphology, and amplitude. The rate is typically greater than 300 bpm. (CDISC)

**Synonyms:** - VENTRICULAR FIBRILLATION - VF - VFib - Ventricular fibrillation