Final answer:
Sudden cardiac arrest in children is rare and usually associated with underlying heart disease. Common causes include long QT syndrome, hypertrophic cardiomyopathy, myocarditis, and drug intoxication.
Step-by-step explanation:
Sudden cardiac arrest in children is rare, but when it occurs, it is usually associated with underlying heart disease. The common causes of sudden cardiac arrest in children include long QT syndrome, hypertrophic cardiomyopathy, myocarditis, and drug intoxication.