Assertion: atrial fibrillation's condition | /r/HasSubevent | overexertion
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Source sentences:
text: It tends to do this when there is a specific trigger such as coronary artery bypass surgery, hyperthyroidism, pericarditis, alcohol intoxication (or other stimulants such as some of the over-the-counter supplements and even caffeine), other acute illnesses that cause extreme vomiting and some conditions that lead to overexertion.