Types of Arrhythmias http://www.heart.org/HEARTORG/Conditions/Arrhythmia/TypesofArrhythmias/Ventricular-Fibrillation_UCM_302042_Article.jsp Ventricular fibrillation can cause sudden cardiac arrest, a medical emergency requiring immediate CPR and defibrillation. Fri, 23 Apr 2010 05:00:00 GMT http://www.heart.org/HEARTORG/Conditions/Arrhythmia/TypesofArrhythmias/Ventricular-Fibrillation_UCM_302042_Article.jsp 2010-04-23T05:00:00Z