Clinical Course of Residual Ventricular Septal Defects After Congenital Heart Disease Repair.

Abstract

The clinical course of residual ventricular septal defects after congenital heart disease repair is not completely elucidated in the medical literature. This study assessed the incidence, size, and clinical course of residual defects.This single-center retrospective study included 132 patients who survived after ventricular septal defect patch closure (n = 107) and intracardiac repair of double-outlet right ventricle (n = 16) and tetralogy of Fallot (n = 9). Residual defect was evaluated on transthoracic echocardiogram upon hospital discharge and at outpatient clinic visits.The median age at surgery was 1.2 (0.3-13.9) years. In total, 45 (34.1%) patients presented with residual defects upon hospital discharge. The residual defects were within 2mm (n = 27), 2-3mm (n = 15), and > 3mm (n = 3), and the median size was 1.5 (0.5-3.8) mm. There was no late mortality during a median follow-up of 5.4years. Among 42 residual defects measuring < 3mm upon hospital discharge, 37 (82.2%) spontaneously closed. Further, five defects decreased in size (1.8 ± 0.6mm upon hospital discharge vs1.2 ± 0.8mm at the latest visits, p = 0.15). However, the size of three residual defects measuring > 3mm upon hospital discharge increased, and two patients required re-surgery for residual defect.Significant residual defect requiring reoperation was rare. In most cases, residual defects measuring < 3mm upon hospital discharge spontaneously closed within 5years, and the size of the other defects decreased.