[A study on spontaneous closure of ventricular septal defect using 2 dimensional echocardiography]

The results of 2 dimensional echocardiographic (2DE) observation in 73 patients with clinically diagnosed spontaneous closure of ventricular septal defect (VSD) were reported. 2DE showed that aneurysm of the membranous septum formed at the defect portion in 54 patients (74%), tricuspid valve leaflet tissue adhered to the defect portion in 2 patients, coarse appearance of the membranous septum in 8 patients, no defect in 9 patients. There was no shunt flow detected in 59 patients, trivial shunt flow in 14 patients on Doppler echocardiography. All VSD were of the membranous and perimembranous inlet type. The results of this study suggested spontaneous closure of membranous VSD was related to the aneurysmal formation of the membranous septum and adhesion of tricuspid valve tissue.