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What is sudden cardiac death?

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Sudden cardiac death (SCD) is a sudden, unexpected death caused by loss of heart function (sudden cardiac arrest). It's the largest cause of natural death in the U.S. and is responsible for half of all heart disease deaths. Most sudden cardiac deaths are caused by abnormal heart rhythms called arrhythmias. Ventricular fibrillation, a disorganized firing of impulses from the the heart's lower chambers, is most common life-threatening arrhythmia. If left untreated, you could die within minutes.

SOURCE: 

The American Heart Association.  

Reviewed by James Beckerman on June 1, 2018

SOURCE: 

The American Heart Association.  

Reviewed by James Beckerman on June 1, 2018

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How is sudden cardiac arrest different from a heart attack?

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