Sudden Cardiac Arrest

Immediately following resuscitation from a sudden cardiac arrest, the priority shifts to identifying the underlying cause so that the child's ongoing risk can be understood and managed. This evaluation typically includes:

• Electrocardiogram to assess the heart's electrical activity
• Echocardiogram to examine the heart's structure
• Exercise stress test or extended heart rhythm monitoring, in some cases, to capture any abnormal patterns that might not appear on a single, brief recording
• Genetic testing, frequently recommended both for the child and, depending on the findings, for close family members, since many of the underlying causes of pediatric sudden cardiac arrest are inherited and identifying a specific genetic condition can guide treatment and prompt screening of relatives who may be silently at risk

When a family history of sudden cardiac arrest or unexplained death exists but no event has yet occurred in the child being evaluated, this same diagnostic approach is used proactively to screen for risk before any emergency takes place.

The immediate, life-saving treatment for sudden cardiac arrest is high-quality CPR combined with early defibrillation using an AED, which delivers an electrical shock to restore a normal heart rhythm; survival chances fall sharply for every minute this treatment is delayed. Once a child has been resuscitated and stabilized in a hospital setting, treatment shifts to addressing the underlying condition that caused the arrest and may include:

• Medications to control heart rhythm
• Catheter-based procedures or surgery to treat a structural heart problem
• Correction of an electrolyte imbalance or other reversible trigger
• Implantable cardioverter-defibrillator — for children found to be at ongoing risk of a life-threatening arrhythmia, a small device placed under the skin that continuously monitors the heart's rhythm and delivers a shock automatically if a dangerous rhythm develops, to prevent a future arrest