Atrioventricular septal defect

（重定向自Atrioventricular canal defect）

This picture shows how different individuals (homozygous positive +/+, heterozygous null +/-, or homozygous null -/- differ in the development of the heart.

Ultrasound showing a complete atrioventricular septal defect

Atrioventricular septal defect (AVSD) or atrioventricular canal defect (AVCD), previously known as "common atrioventricular canal" (CAVC) or "endocardial cushion defect", is characterized by a deficiency of the atrioventricular septum of the heart. It is caused by an abnormal or inadequate fusion of the superior and inferior endocardial cushions with the mid portion of the atrial septum and the muscular portion of the ventricular septum.

单词	Atrioventricular canal defect
释义	Atrioventricular canal defect 英语百科 Atrioventricular septal defect （重定向自Atrioventricular canal defect） Atrioventricular septal defect (AVSD) or atrioventricular canal defect (AVCD), previously known as "common atrioventricular canal" (CAVC) or "endocardial cushion defect", is characterized by a deficiency of the atrioventricular septum of the heart. It is caused by an abnormal or inadequate fusion of the superior and inferior endocardial cushions with the mid portion of the atrial septum and the muscular portion of the ventricular septum.
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