Ventricular fibrillation - Wikipedia, the free encyclopedia


** Ventricular fibrillation **

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Ventricular fibrillation
Ventricular fibrillation.png12-lead ECG of ventricular fibrillation
Classification and external resources
Specialty Cardiology
ICD-10 I49.0
ICD-9-CM 427.41
DiseasesDB 13798
MedlinePlus 007200
Patient UK Ventricular fibrillation
MeSH D014693
[edit on Wikidata]

*Ventricular fibrillation* (*V-fib* or *VF*) is a condition in which there
is uncoordinated contraction of the cardiac muscle of the ventricles in the
heart, making them quiver rather than contract properly. Because there is
no co-ordinated contraction of the ventricles, there is no significant
cardiac output, thus fulfilling the conditions of a cardiac arrest. It is
the most commonly identified arrhythmia in cardiac arrest patients, and
requires prompt treatment if identified on electrocardiography.^[1] Left
untreated, ventricular fibrillation will quickly degenerate into asystole
and is associated with a high mortality. Patients who are not revived soon
enough (within about five minutes at room temperature) can sustain
irreversible brain damage and can become brain-dead, because of cerebral


· 1 Signs and symptoms
· 2 Causes
· 3 Pathophysiology

· 3.1 Abnormal automaticity
· 3.2 Re-entry
· 3.3 Triggered activity

· 3.3.1 Power spectrum

· 3.4 Histopathology

· 4 Treatment
· 5 Epidemiology
· 6 History
· 7 See also
· 8 References
· 9 External links

*Signs and symptoms[edit]*

File:Ventricular fibrillation video.webmPlay media
Video explanation

Ventricular fibrillation is a cause of cardiac arrest and sudden cardiac
death. The ventricular muscle twitches randomly rather than contracting in
a co-ordinated fashion (from the apex of the heart to the outflow of the
ventricles), and so the ventricles fail to pump blood around the body -
because of this, it is classified as a cardiac arrest rhythm, and patients


does v fib mean

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