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It depends.

Children often have second to second variations in their heartbeats due to respiratory affects on the centers that control heart rate. Sinus arrythmia is an example of this normal physiologic "irregular heart rate".

There certainly are many much more rare and dangerous causes of an irregular heart rate but in an asymptomatic 8 year old these are extremely unlikely. I would contact your pediatrician and discuss with him/her exactly what you mean by "irregular heart rate".

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13y ago
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16y ago

The normal heart rate of a 3 year old is 80-130 beats per minute.

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17y ago

Roughly 100 beats per minute, but it can range between 80-120.

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9y ago

The normal, resting heart rate for a 9 year old boy is between 70 and 110 beats per minute. If they are a very active child, they may be under 70 beats per minute consistently.

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10y ago

70-110 beats/ min

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11y ago

120 BPM

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12y ago

120

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Q: What is normal 3 month old heart rate?
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