Heart Seizure

I read an article about Florence Griffith Joyner, who died in 1998 and he lists his cause of death as a heart attack. What is the difference between that and a heart attack?

Heart attack and seizure of the heart are general terms that laymen are often used interchangeably and can describe a wide range of conditions related to heart. Sudden death caused by a heart problem is usually related to an arrhythmia, a severe disruption of electrical initiation of cardiac muscle, without warning and sometimes without prior symptoms. The heart ceases its normal pumping action and chaotic spasms. This could be more accurately labeled as a heart "seizure". If the person is already in a hospital, they can be saved by prompt intervention of a defibrillator. (The "load" and "clear", you hear screams in a television series in the event of medical zap the patient's chest.)
A heart "attack" most often refers to the condition caused by a blockage of an artery that supplies blood to the heart muscle. The medical terms for multiple heart disease are more accurate and may require a little explaining to the average person. Each time the heart stops beating for some reason, it might be called a "heart attack" while not technically correct that the end result may be the same.