| S-A | sinoatrial; sinoauricular |
|---|---|
| SAB | Scientific Advisory Board; serum albumin; significant asymptomatic bacteriuria; sinoatrial block; So... |
| SAEB | sinoatrial entrance block |
| SAN | sinoatrial node; sinoauricular node; slept all night; solitary autonomous nodule |
| SANDR | sinoatrial nodal reentry |