Mechanisms of closure of perimembranous ventricular septal defect

摘要: Although more defects in the muscular ventricular septum close spontaneously than do abutting on membranous (perimembranous defects), a good proportion of latter show tendency to diminish size and close. The mechanism responsible for this closure is usually described as an aneurysm septum, although some doubt has been cast whether precise mechanism. In study, 69 unoperated hearts with septal defect were examined; 26 (38%) showed evidence partial none extended exclusively into outlet part septum. Two thirds trabecular perimembranous defects, almost half inlet one third confluent signs occlusion. anatomic structures most frequently reduplication tricuspid valve tissue (16 cases), adhesion leaflets (6 prolapse aortic leaflet (3 cases). Only 2 cases subaortic tags observed which might have originated from remnant present study shows that was two fifths studied, only rarely it due so-called