RT Journal Article SR Electronic T1 Can atrioventricular septal defects exist with intact septal structures? JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 832 OP 835 DO 10.1136/hrt.2005.069278 VO 92 IS 6 A1 J P Kaski A1 J Wolfenden A1 M Josen A1 P E F Daubeney A1 E A Shinebourne YR 2006 UL http://heart.bmj.com/content/92/6/832.abstract AB 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.