| 1. | Figure 4 - 34 . embryology of the atrioventricular junction . the primitive atrioventricular canal is partitioned by the growth of the endocardial cushions ( ec ) , interatrial septum ( ias ) , and interventricular septum ( ivs ) 房室交界处的胚胎发育。原始房室管生长分化为心内膜垫( ec ) ,房间隔( ias )和室间隔( ivs ) 。 |