Clinical and conventional echocardiographic data in two neonate groups
| Day 0 group (n = 130) | Day 1–7 group (n = 135) | p Value | |
|---|---|---|---|
| Values are mean (SD). | |||
| A, peak atrial flow velocity; E, peak early diastolic flow velocity; LV, left ventricle; NS, not significant. | |||
| Age (after birth) | 10.2 (7.2) hours | 3.9 (2.0) days | |
| Gestational age (weeks) | 39.7 (1.1) | 39.5 (1.6) | NS |
| Heart rate (beats/min) | 125 (10) | 125 (8) | NS |
| Weight (g) | 3055 (321) | 2947 (330) | <0.01 |
| LV diastolic dimension (mm) | 17.5 (1.7) | 17.2 (1.6) | NS |
| Shortening fraction of LV | 0.31 (0.06) | 0.31 (0.05) | NS |
| Transtricuspid E (cm/s) | 38.2 (6.9) | 37.9 (7.1) | NS |
| Transtricuspid A (cm/s) | 49.2 (8.4) | 48.9 (7.5) | NS |
| Transtricuspid A:E | 1.31 (0.23) | 1.32 (0.25) | NS |
| Transmitral E (cm/s) | 56.2 (10.3) | 52.1 (9.5) | <0.001 |
| Transmitral A (cm/s) | 50.0 (7.6) | 48.2 (8.0) | NS |
| Transmitral A:E | 0.91 (0.17) | 0.95 (0.20) | NS |