
Sudden cardiac death is natural death, usually from cardiac causes, heralded by abrupt loss of consciousness within one hour of the onset of acute symptoms. Other forms of sudden death may be noncardiac in origin. Examples include respiratory arrest (such as airway obstruction in cases of choking or asphyxiation), toxicity or poisoning, anaphylaxi...
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http://en.wikipedia.org/wiki/Sudden_cardiac_death

unexpected natural death from cardiac causes, occurring rapidly after onset of acute symptoms in a patient with or without known preexisting heart disease; the cardiac dysfunction produces abrupt loss of cerebral blood flow. The interval between onset of symptoms and death may range from less than one hour to almost 24 ho...
Found on
http://www.encyclo.co.uk/local/21001
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