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Walk the Even Hospital Database by book and chapter — the raw source passages that ground Ask, DDx, and the rest.

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contentuptodate· Content· item f11_60_12224

©2013 UpToDate ® Print Email Atrial and ventricular septal defects This is a drawing of a normal heart. The heart has 4 chambers: right atrium, left atrium, right ventricle, and left ventricle. A child with an atrial septal defect has a hole between the right atrium and the left atrium. A child with an ventricular septal defect has a hole between the right ventricle and the left ventricle.