Ventricular fibrillation, also known as ventricular fibrillation, is a fatal cardiovascular system emergency. Ventricular fibrillation occurs when the heart beats with irregular, rapid electrical impulses, causing the pumping chambers in the heart to quiver in vain, causing a sudden drop in blood pressure and cutting off the blood supply to vital organs, when the rapid, erratic heartbeat causes the heart to suddenly stop supplying blood to the body. The longer the body loses blood, the greater the risk of damage to the brain and other organs, and death can occur within minutes. Ventricular fibrillation, the most common cause of sudden cardiac death, can be life-threatening within seconds and is an emergency that requires immediate medical attention. This condition must be treated with immediate defibrillation, along with high-quality CPR, and the patient must be taken to a hospital immediately.