ECG RHYTHM LAB

Ventricular Fibrillation

Disorganized ventricular electrical activity without coordinated complexes.

Generated six-second Lead II example · No organized rate · not a patient recording.

Typical rate

No organized rate

Regularity

Chaotic

P waves

Absent

PR interval

Not measurable

QRS

No identifiable QRS

What to look for

Chaotic changes in amplitude and shape, without identifiable QRS complexes.

Show this rhythm

Sources and limitations