A nurse is assisting with care for a group of clients on a telemetry unit. Which of the following images should the nurse identify as ventricular fibrillation?

A rhythm showing normal sinus progression with regular P waves and QRS complexes.

A rhythm showing a rapid, chaotic, completely irregular waveform with no identifiable P waves or QRS complexes.

A rhythm showing a sawtooth pattern of flutter waves with a regular ventricular response.

A rhythm showing a regular, wide-complex tachycardia at a rate of 180 beats per minute.