| Average E/e' ratio < 7 = Normal Filling Pressures |
| Average E/e' ratio > 14 = Elevated Filling Pressures |
| If ratio is between 7 and 14, strain rate during IVRT should be obtained from all three apical views |
| Strain rate to Mitral E-wave velocity ratio ≤ 200 cm = Normal Filling Pressures |
| Strain rate to Mitral E-wave velocity ratio > 200 cm = Elevated Filling Pressures |
| If strain/E-wave ratio unobtainable, TR Velocity ≤ 2.8 m/s = Normal Filling Pressures |
| If strain/E-wave ratio unobtainable, TR Velocity > 2.8 m/s = Elevated Filling Pressures |