Your child may feel a fluttering or pounding in the chest caused by an early or extra beat. Premature contractions (atrial or ventricular) are typically minor arrhythmias.It’s often caused by a congenital heart defect, but also can be caused by disease, surgery or injury. Heart block, when electrical impulses can’t make their way from the upper to lower chambers of the heart.It may occur after surgery to correct a congenital heart defect. Bradycardia can be caused by: Sinus node dysfunction, when the heart’s sinus node isn’t working correctly. Bradycardia, an abnormally slow heart rate.There are several types of arrhythmias, including: In these cases, the arrhythmia may be found only during a physical examination or heart function test.
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