Arrhythmia: There are many reasons to feel your heart beating--oftentimes called palpitations. Sometimes it is innocent and normal such as a rapid heart rate after exertion. Other times it may be serious and is a concerning arrhythmia. Common abnrormal arrhythmias causing palpitations include atrial fibrillation/flutter and supraventricular tachycardia.
Answered 4/7/2013
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A doctor has provided 1 answer
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