What known risk factors predispose a person to sudden cardiac arrest?

Coronary artery dz. The most common cause is disease of the coronary arteries, but problems in the electrical conducting system can also be a cause. Cardiomyopathies of many different causes are associated with sudden cardiac arrest. Many of these people have implanted defibrillators to reduce this risk.

Related Questions

How can unexplained sudden cardiac arrest with no known cause happen to people with healthy hearts? Is there anything that could avoid this?

testing. Usually this can occur in certain condition when a person is involved in athletics or some strenuous activities. Only thing a person can do these days to have a check before participating in sports especially when there is a family history. Read more...
Not normal. There are some underlying issues. Electrical system, or congenital that surface with sudden cardiac arrest commonly. Read more...

A 51 year old ex figure skater, who's in good shape had Sudden Cardiac Arrest. Are odds of SCA very low for someone with no known heart abnormalities?

Yes, but never zero. Known for over 8 decades that 1/2 of US population has atherosclerosis by later childhood, despite typically no symptoms for decades. Symptoms are from plaque ruptures & clots, most without evident symptoms, yet can close major arteries within minutes: thus SCA with no warning signs in advance, including normal cholesterol & angiogram without evident problems days prior. Read more...

What causes sudden cardiac arrest in a young and previously healthy person?

Depends. Undiagnosed structural heart problems can (very rarely) lead to a cardiac arrest in what appears to be an otherwise healthy person. Certain illegal drugs, particularly stimulants such as cocaine, also have the potential to cause rhythm problems that can lead to cardiac arrest. Read more...
Sick heart. If heart is not working well and if suddenly there is a high demand this can cause an arrest. Read more...

I was wondering what are the chances of a young person suffering from sudden cardiac arrest?

SCA. Sudden cardiac arrest in a healthy young person is a very low probability event. When you hear about it in a young person, they generally have a structural heart problem or an underlying disease. Read more...