title: Can atrioventricular septal defects exist with intact septal structures?
abstract: The hallmark of an atrioventricular septal defect (AVSD) is a common atrioventricular junction, giving rise to a trileaflet left atrioventricular valve. AVSDs have the potential for interatrial shunting alone, interventricular shunting alone, or both. AVSDs without interatrial or interventricular communications have been identified at postmortem examination, but there are no reports of AVSDs with intact septal structures diagnosed in life. Six patients are described with AVSD and intact atrial and ventricular septa diagnosed echocardiographically. This report shows that AVSDs can exist without interatrial or interventricular communications and that the characteristic feature of this condition, the common atrioventricular junction with a trileaflet left atrioventricular valve, can be diagnosed in life by using cross sectional echocardiography. AVSDs with intact septal structures may be more common than previously described.
authors.affiliation: Inherited Cardiovascular Diseases Unit, Great Ormond Street Hospital, London, UK.
authors.forename: J P
authors.initials: JP
authors.lastname: Kaski
authors.forename: J
authors.initials: J
authors.lastname: Wolfenden
authors.forename: M
authors.initials: M
authors.lastname: Josen
authors.forename: P E F
authors.initials: PE
authors.lastname: Daubeney
authors.forename: E A
authors.initials: EA
authors.lastname: Shinebourne
mesh_terms: D002675:Child, Preschool; D004314:Down Syndrome / Q000000981:diagnostic imaging; D004452:Echocardiography; D005260:Female; D006344:Heart Septal Defects, Atrial / Q000000981:diagnostic imaging*; D006345:Heart Septal Defects, Ventricular / Q000000981:diagnostic imaging*; D006346:Heart Septum / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male