Tachycardia: Tachycardia is caused by many factors, and there is sinus tachycardia which can be caused due to anxiety, panic attacks, exercising of any kind, certain medications, overactive thyroid.Then there is supraventricular or atrial tachycardia due to defect in the rhythm process of heart for which you need to find the cause and treatment through cardiologist.I f you have long term tachycardia see your md.
Answered 12/20/2012
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