Cardiac arrest! Heart attack! The very words seem to shout with a sudden, out-of-the-blue urgency. And that's how most everyone has come to understand heart attacks: they hit hard, with no warning.
Read MoreA heart attack can be considered a circulation problem and occurs when the blood supply to the heart is either reduced or completely cut off. This can occur because of a blood clot or a narrowing of the arteries. When the heart muscle doesn’t receive blood, the lack of oxygen causes damage and it begins to die.
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