Ventricular Fibrillation

Ventricular Fibrillation (VF, VFib) is a lethal rhythm defined by disorganized electrical activity of the ventricles. On the EKG it creates random, erratic deflections with no discernible pattern.

EKG monitor simulation of Atrial Fibrillation at a rate of 152bpm.
Ventricular Fibrillation (VF) EKG / ECG monitor capture (software gen.)

VFib is the name for disorganized electrical activity in the ventricles that is not functional. It cannot produce a pulse and is considered cardiac arrest.

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EKG Vocabulary:
Fibrillation means disorganized electrical activity and is recorded on the EKG as constant, random, erratic deflections from the baseline.
1:00 Ventricular Fibrillation monitor capture.

Once a tracing is identified as having no identifiable waves or patterns it can be classified as VF. A Ventricular Fibrillation EKG is:

An EKG tracing with chaotic and random deflections that produce no patterns whatsoever.

Defining Characteristics of VF

A typical VF EKG tracing.
A typical VF EKG tracing.

The only defining characteristic of Ventricular Fibrillation is the lack of defining characteristics. If a waveform, complex, segment, or pattern of any type can be identified, the tracing may not be VF. If all of the visible deflections are random the traing is VFib.

Because of this VF has no measurement definitions at all as there are no waves or segments to time.

A typical Ventricular Fibrillation ECG monitor capture.
A typical Ventricular Fibrillation ECG monitor capture.

Below are several more examples of Ventricular Fibrillation presented as monitor captures as well as on EGK graphs.

Practice VF EKG tracing.
Practice VF EKG tracing.
Practice ECG of VFib.
Practice ECG of VFib.
Ventricular Fibrillation practice EKG.
Ventricular Fibrillation practice EKG.

After becoming confident in identifying EKG's as Ventricular Fibrillation head back to our EKG Rhythm Index to find information on another ECG. Otherwise practice interpreting novel EKG's with our EKG Generator:

Basic EKG App

Our Basic EKG Generator is free with an email signup and covers Normal Sinus Rhythm along with common arrhythmia.

Pro EKG App

Our Pro EKG Generator covers over 40 different rhythm categories, multiple display options, has Quiz and Simulation modes, and more! Try it out for just $5 for a month.