When your heart flutters A fluttering sensation in your chest is a specific type of heart palpitation that may indicate an atrial flutter . This condition is the result of an arrhythmia that causes tachycardia, which is a fast heartbeat (more than 100 beats a minute).
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Although heart palpitations can be worrisome, they’re usually harmless . Rarely, heart palpitations can be a symptom of a more serious heart condition, such as an irregular heartbeat (arrhythmia), that might require treatment.
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