Table 3. Left Ventricular Diastolic Function Indicatorsa.
| Indicator | Median (Range) | P Value vs Normative Data |
|---|---|---|
| Mitral inflow velocities | ||
| E:A ratio | 1.2 (0.7 to 2.7) | NA |
| E:A ratio z score | −1.4 (−2 to 1.2) | <.001 |
| Tissue Doppler velocities | ||
| Septal E′, cm/s | 9.3 (6.0 to 13.3) | NA |
| Septal E′ z score | −1.8 (−3.6 to 1.3) | <.001 |
| E:septal E′ ratio | 9.1 (6.5 to 17.4) | NA |
| E:septal E′ z score | 1 (−1 to 6.3) | <.001 |
| Septal E′:A′ ratio | 1.2 (0.8 to 3.5) | NA |
| Septal E′:A′ z score | −1.6 (−2.5 to 1.9) | <.001 |
| Lateral E′, cm/s | 9.9 (5.6 to 17) | NA |
| Lateral E′ z score | −2.4 (−4.4 to 0.8) | <.001 |
| E:lateral E′ ratio | 8.7 (4.9 to 16.1) | NA |
| E:lateral E′ z score | 2.1 (−0.8 to 7.3) | <.001 |
| Lateral E′:A′ ratio | 1.4 (0.6 to 4.6) | NA |
| Lateral E′:A′ z score | −1.7 (−2.5 to 2.4) | <.001 |
Abbreviations: A′, mitral late diastolic tissue Doppler myocardial velocity; E, mitral early diastolic Doppler inflow velocity; E′, mitral early diastolic tissue Doppler myocardial velocity; NA, not applicable.
a
The z scores were calculated using previously published normative data from the echocardiography laboratory at Boston Children’s Hospital. The P values were calculated by comparing median z scores against the expected population mean value of 0.