Final answer:
The treatment of hemodynamically unstable child with supraventricular tachycardia commonly involves emergency cardioversion, along with possible medication use for stable cases. Chronic management may require an artificial pacemaker or an implantable cardioverter defibrillator.
Step-by-step explanation:
The treatment for a hemodynamically unstable child with supraventricular tachycardia (SVT) varies based on the underlying cause and severity of the condition. However, a common emergency treatment for unstable SVT involves synchronized cardioversion. Essentially, a controlled electric shock is administered to the heart to restore a normal rhythm. In cases where the patient is not in immediate danger and is hemodynamically stable, medications may be used, such as beta blockers or antiarrhythmic agents, for example, procainamide.
Nevertheless, the most critical aspect is to stabilize the child's condition promptly, and interventions such as defibrillation can be life-saving when ventricular fibrillation is present. For chronic management, an artificial pacemaker or an implantable cardioverter defibrillator (ICD) might be indicated, depending on the specific diagnosis.