Postoperative ectopic atrial tachycardia in children with congenital heart disease

Area of Science:

• Pediatric Cardiology
• Cardiac Surgery
• Electrophysiology

Background:

• Postoperative ectopic atrial tachycardia (EAT) is a recognized complication after pediatric cardiac surgery.
• The underlying causes and clinical significance of EAT in this population are not well understood.

Purpose of the Study:

• To identify pre-, intra-, and postoperative factors associated with the development of EAT in children undergoing cardiac surgery.
• To elucidate the risk factors and outcomes of EAT in pediatric cardiac surgery patients.

Main Methods:

• Retrospective study of pediatric patients who underwent cardiac surgery.
• Analysis of pre-, intra-, and postoperative clinical variables, including demographics, physiological data, and procedural details.
• Comparison of EAT cases with a control group of non-EAT patients.

Main Results:

• EAT cases were younger (median 6 vs 17 months) and had lower preoperative oxygen saturation (84% vs 99%).
• Patients with EAT experienced longer cardiopulmonary bypass and clamp times, required more inotropic support, and had longer intensive care unit (ICU) stays (10 vs 3 days).
• EAT was associated with a trend towards increased mortality (p=0.10) but resolved before discharge in most survivors (10/16).

Conclusions:

• The etiology of postoperative EAT is multifactorial, potentially involving atrial septum disruption, prolonged bypass, inotropic support, and hypokalemia.
• Young, critically ill, and cyanotic children are at higher risk for developing EAT after cardiac surgery.
• While associated with prolonged ICU stay, EAT generally resolves, suggesting a favorable prognosis in most cases.