Atrioventricular valve diverticulum--an unusual congenital malformation.
A previously unreported congenital malformation was noted in an infant with right atrial isomerism ("asplenia syndrome"). The superior bridging leaflet of a common atrioventricular valve was attached to a band of muscular tissue spanning the atrioventricular junction. A large ventricular diverticulum extended into the substance of this band, possibly due to traction during fetal life.
D000015:Abnormalities, Multiple / Q000473:pathology*; D005260:Female; D006343:Heart Septal Defects / Q000473:pathology*; D006801:Humans; D007223:Infant; D012857:Situs Inversus / Q000473:pathology; D013154:Spleen / Q000002:abnormalities*; D013577:Syndrome; D014261:Tricuspid Valve / Q000002:abnormalities