What causes Cardiac Arrest?

Causes of cardiac arrest include:

• Ventricular fibrillation -a rapid, irregular heart rhythm preventing any circulation of blood (most common cause of sudden cardiac arrest)
• Ventricular tachycardia-a rapid, but regular heart rhythm that, if sustained, may turn into ventricular fibrillation
• Dramatic slowing of heart rate due to failure of its pacemaker or severe heart block (interference with electrical conduction)
• Respiratory arrest
• Choking or drowning
• Electrocution
• Hypothermia
• Sudden loss of blood pressure
• Unknown causes