Final answer:
Ventricular fibrillation is characterized by rapid, uncoordinated ventricular contractions and it requires immediate medical attention with defibrillation being the most common treatment.
Step-by-step explanation:
Ventricular fibrillation is rapid, uncoordinated ventricular contractions. This is a severe cardiac emergency where the heart's electrical activity becomes disrupted, leading to a wildly irregular heartbeat, which in turn impedes the heart's ability to pump blood effectively. In a situation where someone is experiencing ventricular fibrillation, immediate medical intervention is critical. The most common treatment is defibrillation, which involves delivering an electrical shock to the heart using external automated defibrillators (EADs) in an attempt to reset the heart's rhythm to a normal sinus rhythm. EADs are crucial life-saving devices that are now commonly found in public spaces and can be operated by non-medical personnel thanks to simple verbal instructions they provide.