Tachycardia in adult is defined as a pulse rate of >100 beats per minute.
An abnormally fast pulse has various possible causes:
Tachycardia in a child varies depending on the age of a child (see table below). For example a pulse rate of 130 in a 10 year old is tachycardia but not in a 1 year old.
Heart rate by age (normal ranges) (1):
Age (years) | Heart rate (beats per minute) |
<1 | 110-160 |
1-2 | 100-150 |
2-5 | 95-140 |
5-12 | 80-120 |
>12 | 60-100 |
Reference:
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