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What causes an irregular heartbeat?

An irregular heartbeat, known as arrhythmia, is when the heart beats out of rhythm. The sensation can feel like your heart skipping a beat or fluttering, though in many cases arrhythmia doesn’t present any noticeable symptoms (known as “silent” arrhythmia). Some types of arrhythmia can occur even when your heart is healthy, such as after exercise or when you’re caught by surprise. Other longer lasting and more serious types of arrhythmia are symptomatic of an underlying heart condition.

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