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"You&amp;#039;re probably already familiar with the warning signs of a heart attack. But do you know what&amp;#039;s going on inside your body while your hearts cells are gasping for oxygen?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://health.howstuffworks.com/diseases-conditions/cardiovascular/heart/what-happens-during-a-heart-attack1.htm>