Atrialfibrillation can be dangerous, for over time it can cause more-serious conditions, such as stroke.
房颤比较危险，因为时间长了它可能导致很严重的并发症，比如中风。
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Heart failure. This can result if your heart is pumping ineffectively for a prolonged period due to a bradycardia or tachycardia, such as atrialfibrillation.
心衰持续的心率失常(比如房颤)会使心脏在很长时间里无法有效地泵血，从而引起心衰。
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In several studies, this test alerted doctors to over 90 percent of people with atrialfibrillation, as confirmed by heart monitoring.