Interventricular communication in complete atrioventricular septal defect Kiyoshi Suzuki, MD, PhD, Siew Yen Ho, PhD, Robert H Anderson, MD, Anton E Becker,

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Interventricular communication in complete atrioventricular septal defect Kiyoshi Suzuki, MD, PhD, Siew Yen Ho, PhD, Robert H Anderson, MD, Anton E Becker, MD, PhD, William H Neches, MD, Katsuhiko Tatsuno, MD, PhD, Shigekazu Mimori, MD, PhD The Annals of Thoracic Surgery Volume 66, Issue 4, Pages 1389-1393 (October 1998) DOI: 10.1016/S0003-4975(98)00644-4

Fig 1 Interventricular communication in complete atrioventricular septal defect. (Top) Large communication under both bridging leaflets. (Bottom) Lack of communication under the inferior bridging leaflet (IBL) in the presence of a large defect under the superior bridging leaflet (SBL). Both cases are classified as Rastelli type A morphology. (Ao = aorta; LV = left ventricle.) The Annals of Thoracic Surgery 1998 66, 1389-1393DOI: (10.1016/S0003-4975(98)00644-4)

Fig 2 To determine the degree of deficiency of the ventricular septum, the lengths from the apex to the aortic valve (outlet), to the crux (inlet), and the shortest length from the apex to the crest of the ventricular septum (scoop) were measured. This specimen has a large interventricular communication under both bridging leaflets. (Ao = aorta; LV = left ventricle.) The Annals of Thoracic Surgery 1998 66, 1389-1393DOI: (10.1016/S0003-4975(98)00644-4)

Fig 3 The scoop to inlet ratio was significantly different between those with and without a defect under the inferior bridging leaflet (IBL) (left); however, the scoop to outlet ratio had a significant overlap between the groups (right). The Annals of Thoracic Surgery 1998 66, 1389-1393DOI: (10.1016/S0003-4975(98)00644-4)

Fig 4 Interventricular communication and degree of deficiency of the ventricular septum. Hearts with a defect under both bridging leaflets (A) showed a severe deficiency in both the inlet and outlet components of the ventricular septum. Those without a defect under the inferior bridging leaflet (IBL) (B) showed a mild deficiency of the inlet part and a severe deficiency of the outlet part of the septum. From previous studies [13, 14], those with an ostium primum type (C) are considered to have a mild deficiency in both the inlet and outlet components. (Ao = aorta; LV = left ventricle; SBL = superior bridging leaflet.) The Annals of Thoracic Surgery 1998 66, 1389-1393DOI: (10.1016/S0003-4975(98)00644-4)