Sudden cardiac death is the swift and not expected ending of all heart activity. Breathing and blood flow stop right away. Within seconds, the person is not conscious and dies.

Sudden cardiac death is different from sudden cardiac arrest (SCA). SCA is the sudden loss of heart activity due to an irregular heart rhythm. Survival is possible with fast, proper medical care.

Sudden cardiac death in seemingly healthy people under age 35 is rare. It is more common in males than in females.

Heart conditions that are not diagnosed such as a genetic heart disease can cause sudden death in teenagers and young adults. A heart condition that is not identified may cause a young person to suddenly die during physical activity, such as competitive sports. But sudden cardiac death can occur without activity.

Most student athletes compete yearly without a heart incident. If you or your child is at risk of sudden cardiac death, talk to your healthcare professional. Ask about steps you can take to lower the risk.