Ventricular Tachycardia in Children: 5 Critical Steps

Clinical Scenario :

12-year-old boy with dilated cardiomyopathy suddenly develops palpitations and collapses. On arrival, he is confused and pale. His heart rate is 220/min, blood pressure is 68/40 mmHg, peripheral pulses are weak, and capillary refill time is 5 seconds. Oxygen saturation is 95% on supplemental oxygen. ECG demonstrates monomorphic ventricular tachycardia. A central pulse is palpable.

What is the most appropriate immediate management?

A. Intravenous amiodarone

B. Intravenous adenosine

C. Intravenous lidocaine

D. Synchronized electrical cardioversion

E. Unsynchronized defibrillation

Correct Answer & Explanation:

Correct Answer: D. Synchronized electrical cardioversion

Explanation: Ventricular Tachycardia

This child has unstable wide-complex tachycardia with a pulse, most consistent with ventricular tachycardia (VT). The regular wide-complex rhythm, palpable pulse, hypotension, poor peripheral perfusion, and altered hemodynamic status indicate cardiopulmonary compromise.

According to the 2025 American Heart Association (AHA) and American Academy of Pediatrics (AAP) Pediatric Advanced Life Support (PALS) guidelines, a child with wide-complex tachycardia and cardiopulmonary compromise should receive urgent synchronized electrical cardioversion. The initial recommended energy dose is 0.5–1 J/kg. If unsuccessful, increase the dose to 2 J/kg. Provide sedation when feasible, but never delay cardioversion to administer sedation.

Read the 2025 AHA/AAP Pediatric Advanced Life Support Guidelines.

Why the Other Options Are Incorrect

A. Intravenous adenosine

Incorrect as the preferred initial treatment in this unstable child. Adenosine is primarily used for selected supraventricular tachycardias. It may be considered for a stable, regular, monomorphic wide-complex tachycardia when SVT with aberrancy is possible, preferably with expert consultation. It should not delay electrical treatment in a child with cardiopulmonary compromise.

B. Intravenous amiodarone

Incorrect as the initial intervention when immediate cardioversion is indicated. Antiarrhythmic medication may be considered for selected stable ventricular arrhythmias or persistent arrhythmias under expert guidance, but it must not delay synchronized cardioversion in an unstable child.

C. Intravenous lidocaine

Incorrect as the first-line intervention. Lidocaine may be considered in selected ventricular arrhythmias, but immediate synchronized cardioversion is the priority when a pulse is present and the child is hemodynamically unstable.

D. Synchronized electrical cardioversion

Correct. Synchronized cardioversion delivers the shock in coordination with the QRS complex, reducing the risk of delivering a shock during the vulnerable phase of ventricular repolarization. For pediatric wide-complex tachycardia with cardiopulmonary compromise, start at 0.5–1 J/kg and increase to 2 J/kg if the initial shock is unsuccessful.

E. Unsynchronized defibrillation

Incorrect for the usual management of VT with a pulse. Unsynchronized defibrillation is indicated for pulseless VT or ventricular fibrillation. If the child loses the pulse, immediately switch to the pediatric cardiac arrest algorithm and deliver unsynchronized defibrillation for the shockable rhythm.

Key Learning Point

Management of ventricular tachycardia depends on both pulse status and hemodynamic stability:

Unstable wide-complex tachycardia with a pulse: Immediate synchronized cardioversion, starting at 0.5–1 J/kg and increasing to 2 J/kg if unsuccessful.
Stable regular, monomorphic wide-complex tachycardia: Obtain expert consultation; selected cases may be suitable for antiarrhythmic treatment or adenosine when SVT with aberrancy is suspected.
Pulseless VT or ventricular fibrillation: Immediate unsynchronized defibrillation and the pediatric cardiac arrest algorithm.

Find high yield board exam MCQ on Pulseless ventricular tachycardia in children.

External Resources

References

Lasa JJ, Dhillon G, Duff JP, Hayes J, Kamath-Rayne B, Levy A, et al. Part 8: Pediatric Advanced Life Support: 2025 American Heart Association and American Academy of Pediatrics Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. Pediatrics. 2026;157(1). doi: 10.1542/peds.2025-074351.
American Heart Association. Pediatric tachyarrhythmia with a pulse algorithm. 2025. Available from: https://www.heart.org/-/media/CPR-Files/CPR-Guidelines-Files/2025-Algorithms/Algorithm-PALS-Tachyarrhythmia-250117.pdf.