释义 |
atrial ventricular canal defect a·tri·al ven·tric·u·lar ca·nal de·fecta defect caused by deficient or absent septal tissue immediately above and below the normal level of the atrioventricular valves, including the region normally occupied by the A-V septum in hearts with two ventricles. The A-V valves are abnormal to a varying degree. |