
Ventricular
fibrillation (V Fib) also has many ECG forms but
is commonly represented as being "sawtooth" in shape. It is an
erratic, chaotic pattern of QRS complexes. The ectopic foci which
create this condition stimulate the ventricles randomly,
preventing them from contracting. The ventricular musculature
appears to "quiver". There is no cardiac output. Therefore, this
condition is life threatening. The patient loses consciousness
immediately. Cardioversion must be used to terminate this
arrhythmia.