Pediatric rhythm recognition requires age-specific rate thresholds and different algorithm logic than adult ACLS. This page covers the critical PALS differentials, age-stratified normal rate ranges, and the key management differences driven by pediatric physiology.
Using adult rate thresholds for pediatric patients causes both under- and over-escalation. A heart rate of 160 bpm is bradycardia in a neonate but tachycardia in an adolescent.
| Age Group | Normal (bpm) | Sinus Tach Max | SVT Range | Brady Threshold |
|---|---|---|---|---|
| Neonate (0–30 days) | 100–160 | < 220 | 220–300 | < 100 |
| Infant (1–12 months) | 90–150 | < 220 | 220–300 | < 80 |
| Toddler (1–3 years) | 70–120 | < 200 | 180–270 | < 70 |
| Child (4–12 years) | 60–100 | < 180 | 150–260 | < 60 |
| Adolescent (13–18) | 55–95 | < 160 | 150–250 | < 55 |
In children, bradycardia is most often caused by hypoxia, not primary conduction disease. The PALS approach mandates: support ventilation and oxygenation FIRST. If 30 seconds of effective bag-valve-mask ventilation with supplemental O₂ does not improve heart rate, then CPR and medications are initiated. Giving atropine before ventilating a hypoxic child treats a symptom while ignoring the cause. This is the fundamental difference from adult ACLS: in children, respiratory failure precedes and causes cardiac arrest — treat the airway first.
Pediatric defibrillation: 2 J/kg for the first shock. Subsequent shocks can be increased to 4 J/kg. This is weight-based — a 20 kg child receives 40J (first shock), up to 80J (subsequent). Adult defibrillation uses fixed energy: 120–200J biphasic for adults. Use pediatric-specific pads/paddles when available (< 10 kg: infant paddles). If only adult pads are available, ensure minimum 3 cm separation between pads on the chest.
Rate variability with state change is the most clinically useful bedside discriminator before a 12-lead is available. SVT has a fixed rate regardless of whether the infant is crying, being held, or sleeping. Sinus tachycardia rate decreases when the infant is calmed, fed, or the cause (fever, pain, dehydration) is addressed. On the monitor: SVT shows absent or retrograde P-waves; sinus tachycardia shows upright sinus P-waves before every QRS. Rate threshold (> 220 in infants) is supportive but not definitive — some sinus tachycardias in febrile neonates can reach 220.
Respiratory sinus arrhythmia (RSA) is a normal, healthy physiologic variation caused by vagal tone fluctuations with breathing. Heart rate increases with inspiration (vagal inhibition) and slows with expiration (vagal restoration). RSA is more prominent in children and athletes because of higher baseline vagal tone. It is NOT AFib, NOT ectopy, and NOT conduction disease. Key discriminators: RSA has uniformly sinus P-waves throughout, R-R variation correlates exactly with breathing, and no beats are dropped. RSA should not trigger escalation — it is a sign of healthy autonomic function.
Yes. The Pediatric ECG lane within the NurseNest ECG module covers PALS-relevant rhythms: SVT vs sinus tachycardia across age groups, hypoxic bradycardia management, PALS arrest rhythms (shockable and non-shockable), hyperkalemia ECG changes in pediatric patients, long QT syndrome and torsades risk, WPW and pre-excitation, and post-operative congenital heart telemetry patterns. Six PALS deterioration case simulations include decision-point interaction and nursing error trap teaching. Included with eligible RN and NP subscriptions.
Pediatric ECG lane with PALS case simulations included with eligible RN and NP subscriptions.
