| MSER | mean systolic ejection rate |
|---|---|
| PEP | peptidase; phospho(enol)pyruvate; peer evaluation program; phosphoenolpyruvate; pigmentation, edema,... |
| PEPc | corrected pre-ejection period |
| PEPI | pre-ejection period index |
| PER | peak ejection rate; periodogram; protein efficiency ratio |