Pediatric Heart Expert Forum
Sinus Tachicardia
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Questions in this forum are answered by pediatric cardiologists, cardiothoracic surgeons and anesthesiologists from The Children's Hospital of Philadelphia. This forum is for questions and support about pediatric heart problems, symptoms and topics such as heart murmurs, palpitations, fainting, chest pain, congenital heart defects (including management and intervention), fetal cardiology, adult congenital cardiology, arrhythmias and pre-participation athletic screening.

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Sinus Tachicardia

My daughter 5 has been diagnosed with Sinus Tarchicardia. She is active but at times experiences pain in her chest and stomach. She is rarely tired and sleeps only at night and during the day does not want to sleep.
Her heart beats fast and a bit harder than normal and sounds erratic.
Whats the cause, and how can she be helped and protected from a worse condition?
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Sinus tachycardia means that the normal heart rhythm is sinus rhythm, but the heart rate is higher than normal for the patient's age.  The younger the child, the higher the average heart rate.  Chest pain in children is rarely cardiac in nature.  In order to know the significance of your daughter's heart rate you have to know what the heart rate ranges are, the average heart rate, and if she has appropriate heart rate variability.  That can be accomplished by having your daughter wear a holter monitor for 24 hours.  That can look for irregular heart beats as well.  If a child has an abnormally elevated heart rate, but otherwise seems fine, as your daughter seems to be, then other things have to be looked for: thyroid abnormalities, anemia and catecholamine secreting tumors. Sometimes children just don't drink enough fluid, or, conversely, drink too much caffeine. You should review her diet and drinking habits and speak further with your doctor as to how much of a work up is necessary.
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