Whether it is normal for children to have sinus arrhythmia depends on the characteristics of the sinus arrhythmia and whether it is related to non - pathological factors such as respiration.
There are many reasons for sinus arrhythmia in children, which are related to factors such as respiration, nervousness, crying during examination, fatigue, drugs, hypoxia, acid - base imbalance, electrolyte disorder, and infection.
At this time, it is necessary to judge whether the sinus arrhythmia is normal based on the characteristics of the arrhythmia and the causes of the arrhythmia.