| LRI | lamina rara interna; lower respiratory [tract] illness; lower respiratory [tract] infection; lymphoc... |
|---|---|
| LRTI | lower respiratory tract illness; lower respiratory tract infection |
| Ao | orifice area |
| AVO | aortic valve opening; aortic valve orifice; atrioventricular opening |
| CAVO | common atrioventricular orifice |