Typically, some kind of heart disease is responsible for ventricular fibrillation. The most common cause of V-fib is a disturbance in the electrical signals going through the heart after someone experiences his or her first heart attack, or issues resulting from a scar in the heart muscle tissue following a previous heart attack. Other causes of V-fib include an insufficient amount of blood flowing to the heart, drug toxicity, issues with the aorta, and sepsis, a severe infection in the body.

marrio31 / Getty Images
This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.