Introduction
Ventricular septal defect is the most common cardiac defect and accounts for 25% of all congenital heart diseases. Large ventricular septal defects with excessive pulmonary blood flow are responsible for dyspnea, feeding difficulties, poor growth, recurrent pulmonary infections, and cardiac failure in early infancy. For these reasons, large ventricular septal defects cause significant morbidity and mortality in infants [1]. Surgical closure of ventricular septal defect is still the most common pediatric cardiac surgical procedure. Recent advances in surgical techniques and postoperative patient care have led to a reduction in mortality and morbidity [2]. However, complications still occur, and the risk factors associated with these complications must be identified [3]. Some studies have found that low birth weight and young age (<6 months) at the time of the operation are related to morbidity [2]. However, this finding conradicts those reported in some studies [4]. The aim of this study was to evaluate the outcomes of ventricular septal defect surgery in our center and to define the risk factors of the complications of ventricular septal defect surgery.