| RAI | radioactive iodine; radioactive isotope; resident assessment instrument; resting ankle index; right ... |
|---|---|
| RAR | rapidly adapting receptor; rat insulin receptor; retinoic acid receptor; right arm reclining; right ... |
| RB | radiation burn; rating board; rebreathing; reticulate body; retinoblastoma; right bronchus; right bu... |
| RBA | relative binding affinity; rescue breathing apparatus; right basilar artery; right brachial artery; ... |
| RCA | red cell agglutination; relative chemotactic activity; renal cell carcinoma; right carotid artery; r... |
| left-to-right shunt | A diversion of blood from the left side of the heart to right (as through a septal defect), or from the systemic circulation to the pulmonary (as through a patent ductus arteriosus). (05 Mar 2000) |
|---|---|
| left-to-right shunts | <radiology> Atrial septal defect, ventricular septal defect, patent ductus arteriosus, aorticopulmonary window, endocardial cushion defect, partial anomalous pulmonary venous return (12 Dec 1998) |