Ventricular Fibrillation (VF, VFib) is characterized and can be identified as a lethal
arythmia. Because there is no organized muscular contraction of the myocardium, no circulation occurs.
When looking at a recording you will notice an absence of "P" waves, no QRS complexes and that the
heart is quivering. When visualizing an open heart in VFib the surface of the heart resembles the surface of a bowl of gelatin
having been "bumped".
A patient in VFib is essentially dead and requires immediate action. The only solution
to Ventricular Fibrillation is immediate defibrillation. AHA ECC 2005 guidelines call for a single 200 J (joule) Biphasic
or 360 J monophasic shock immediately followed by the resumption of CPR for up to 2 minutes depending on the patient's response.