When an electrical disruption in the heart causes it to stop abruptly, the flow of blood to the brain and essential organs is halted. If the cardiac beat is not restored by an electrical shock, death might occur within minutes. The most common cause of sudden cardiac arrest (SCA) is some form of cardiomyopathy (a disease of the heart muscle), usually caused by a chronic condition such as diabetes or hypertension. However, SCA can also be triggered by acute problems with the heart's structure or function. For example, if you have a history of heart failure, you are more likely to suffer from another episode if you have fluid in your lungs. This is because excess fluid makes it harder for your heart to do its job. Sudden cardiac arrest is a rare but serious condition that can happen to anyone at any time. It can be caused by many different factors; the most common being heart problems. Other factors include physical trauma to the body, such as a car accident; emotional stress; and certain medications. If you are experiencing symptoms of sudden cardiac arrest, call 911 immediately. The first responders will begin life-saving measures while you wait for medical help to arrive.