| ERV | Expiratory Reserve Volume |
|---|---|
| IRV | Inspiratory Reserve Volume |
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
| BRR | Bannayan-Riley-Ruvalcaba [syndrome]; baroreceptor reflex response; breathing reserve ratio |
| CPR | cardiopulmonary reserve; cardiopulmonary resuscitation; centripetal rub; cerebral cortex perfusion r... |