| AERP | antegrade effective refractory period; atrial effective refractory period |
|---|---|
| ESP | early systolic paradox; echo spacing; effective sensory projection; effective systolic pressure; end... |
| MEC | median effective concentration; middle ear canal; middle ear cell; minimum effective concentration |
| TAR | Thrombocytopenia-Absent Radius |
| ESR | Einstein stoke radius; electric skin resistance; electron spin resonance; equipment service report; ... |