| RSSR | relative slow sinus rate |
|---|---|
| Rst | in paper or thin layer chromatography, the distance that a spot of a substance has moved, relative t... |
| RTU | real-time ultrasonography; relative time unit; renal transplantation unit |
| RVD | relative vertebral density; right ventricular dysplasia |
| RVI | relative value index; right ventricle infarction |