Paediatric cardiac collapse: initial management

cardiac collapse paediatric paediatric anaesthesia Mar 19, 2026

When a child collapses in the operating theatre, rapid recognition and coordinated response are critical. In many cases, collapse reflects advanced shock where circulation can no longer meet the body’s metabolic demands. Immediate action focuses on restoring oxygen delivery and supporting the failing circulatory system.

The underlying physiology is simple but powerful. Cardiac output depends on heart rate and stroke volume, while blood pressure depends on cardiac output and systemic vascular resistance. When shock develops, the body initially compensates by increasing heart rate, redistributing blood flow to vital organs, and increasing respiratory effort. When these mechanisms fail, perfusion drops rapidly and organ injury follows.

Management in theatre begins with a structured, systematic response.

🔴 Rapid A–E assessment to identify airway, breathing, circulation, disability, and exposure concerns.
🔴 Immediate oxygenation and airway support if respiratory compromise is present.
🔴 IV or intraosseous access for rapid drug and fluid administration if vascular access is difficult.
🔴 Fluid resuscitation with 10–20 ml/kg crystalloid boluses to restore circulating volume in most shock states.
🔴 Early escalation to vasoactive support such as adrenaline or dopamine if fluid therapy is insufficient.
🔴 Treat the underlying cause such as haemorrhage, sepsis, or anaphylaxis.

Fluid management requires caution in suspected cardiogenic shock, where smaller fluid boluses may be appropriate and early specialist input is essential.

For the perianaesthesia nurse, preparation and teamwork are vital. Early recognition, clear communication, and rapid access to resuscitation equipment allow the theatre team to stabilise the child while definitive treatment is initiated.

In paediatric emergencies, deterioration can be swift. A structured response ensures that lifesaving interventions begin without delay.

References

Green, M. & Patel, T. (n.d.). Paediatric Shock. TeachMePaediatrics.
Waltzman, M. (2011). Initial Management of Shock in Children.

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