atrioventricular
adjective anatomy specialized uk/ˌeɪ.tri.əʊ.venˈtrɪk.jə.lər/ us/ˌeɪ.tri.oʊ.venˈtrɪk.jə.lɚ/
房室的（心房和心室的）
relating to the connection between the atrium (= upper space) and ventricle (= lower space) of the heart
房室结的
relating to the heart's AV node (= area of the heart that transmits electrical impulses)