1) Auriculoventricular 
Atrioventricular (having to do with an atrium and ventricle) can refer to: ...
pertaining to an atrium of the heart and to a ventricle.
<anatomy, cardiology> Pertaining to an atrium of the heart and to a ventricle. ... (16 Dec 1997) ... 
(a″tre-o-ven-trik´u-lәr) pertaining to or connecting an atrium and ventricle of the heart.
Belonging to a ventricle of the heart.
(AV) Type: Term Pronunciation: ā′trē-ō-ven-trik′yū-lar Definitions: 1. Relating to both the atria and the ventricles of the heart, especially to the ordinary, orthograde transmission of conduction or blood flow.
In anatomy, atrioventricular refers to something relating to, or affecting both the atria and the ventricles of the heart.
[adj] - relating to or affecting the atria and ventricles of the heart
atrioventricular Relating to both the atria and the ventricles of the heart, especially to the ordinary, orthograde transmission of conduction or blood flow.
auriculoventricular adjective relating to or affecting the atria and ventricles of the heart; `atrioventricular disease`
of or pertaining to the atria and ventricles of the heart. Abbr.: AV, A-V
(AV) a cluster of cells between the atria and ventricles that regulate the electrical current.