| S.V.T. | Sustained Ventricular Tachycardia |
|---|---|
| S/D | Systolic to diastolic |
| S/D | Systolic/Diastolic |
| S/D | systolic-diastolic ratio |
| S/I | superior-inferior |
| S/N | Signal to noise |
| S/N | Signal to noise ratio |
| S/RP | scaling and root planing |
| S/V | surface to volume ratio |
| S/W | Swiss Webster |