People often use these terms interchangeably, but they're not the same. A heart attack is when blood flow to the heart is blocked. Sudden cardiac arrest is when the heart malfunctions and suddenly stops beating. A heart attack is a “circulation” problem and sudden cardiac arrest is an “electrical” problem.
A heart attack and cardiac arrest involve the heart, while a stroke involves the brain. A heart attack occurs when blood flow to the heart is blocked.
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