Postoperative arrhythmia in pediatric intensive care unit

Postoperative arrhythmias are a significant concern in pediatric patients following cardiac surgery, with an incidence ranging from 7.5% to 48%. These arrhythmias, classified into tachyarrhythmias and bradyarrhythmias, can be triggered by multiple factors, including the patient’s age, weight, underlying cardiac condition, electrolyte disturbances, surgical technique, and medication use in the pediatric intensive care unit (PICU). Tachyarrhythmias, such as supraventricular and ventricular tachycardias, can cause a reduction in cardiac output and myocardial perfusion, leading to compromised hemodynamics. Bradyarrhythmias, such as sinus bradycardia and atrioventricular nodal dysfunction, may also impact systemic perfusion. The most common postoperative tachyarrhythmia in the PICU is Junctional Ectopic Tachycardia, followed by supraventricular tachycardias and atrial tachycardias. Diagnosis is primarily made with electrocardiogram, with rhythm strips being a useful tool in hemodynamically stable patients. Management includes both pharmacologic and nonpharmacologic interventions, such as antiarrhythmic medications, vagal maneuvers, synchronized cardioversion, and in severe cases, catheter ablation or pacemaker implantation. Timely recognition and treatment are essential to ensure optimal hemodynamic stability and prevent further complications. Understanding the mechanisms and treatment strategies for postoperative arrhythmias is crucial for improving outcomes in pediatric cardiac surgery patients.