vital-signsEN
📋 Tachycardia Thresholds by Age
| Age | Tachycardia If > |
|---|---|
| Neonate (0-1 mo) | 180 bpm |
| Infant (1 mo-1 yr) | 180 bpm |
| Toddler (1-2 yr) | 150 bpm |
| Preschool (3-5 yr) | 140 bpm |
| School-age (6-12 yr) | 120 bpm |
| Adolescent (13+ yr) | 100 bpm |
💡 HR 140 is normal for an infant but tachycardic for a 10-year-old.