| A2 P2 | aortic second sound; pulmonary second sound |
|---|---|
| cps | counts per second; cycles per second |
| fps | feet per second; frames per second |
| rad/s | rad per second; radian per second |
| HB | health board; heart block; heel to buttock; held back; hemoglobin; hepatitis B; His bundle; hold bre... |