单词	atrioventricular node
释义	atrioventricular node noun : a small mass of tissue in the right atrioventricular region of higher vertebrates through which impulses from the sinus node are passed to the ventricles Word History First Known Use 1908, in the meaning defined above Medical Definition atrioventricular node noun : a small mass of tissue that is situated in the wall of the right atrium adjacent to the septum between the atria, passes impulses received from the sinoatrial node to the ventricles by way of the bundle of His, and in some pathological states replaces the sinoatrial node as pacemaker of the heart
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