Table 2.
Echocardiographic and NIRS findings.
| Day of life | 5 | 9 | 19 | 24 | 26 (PDA Ligation) | ||
|---|---|---|---|---|---|---|---|
| PDA diameter (mm) | 3.2 | 1.8 | 3.2 | 3.8 | |||
| PDA maximum gradient (mmHg) | 34 | 31 | 75 | ||||
| LA/Ao ratio | 1.8 | 1.27 | 2.0 | ||||
| E/A ratio | 0.7 | 0.8 | 0.8 | ||||
| IVRT (ms) | Preligation | 1 ha | 12 hb | ||||
| LVCO (ml/kg/min) | 392.5 | 443 | 576 | 576 | 99 | 272 | |
| LVEF (%) | 41 | 38 | 40 | ||||
| SF (%) | 16.9 | 18.1 | |||||
| LVDD (mm) | 14.8 | 14.5 | |||||
| Abdominal Aorta | Absent end-diastolic flow | Absent diastolic flow | Reversed diastolic flow | ||||
| rScO2 (%) | 59 | 62 | 57 | ||||
| rSrO2 (%) | 28 | 60 | 64 | ||||
PDA, patent ductus arteriosus; LA/Ao ratio, Left atrial to aortic ratio; E/A, Mitral E/A waves ratio; IVRT, Isovolumic relaxation time; LVCO, left ventricular cardiac output; LVEF, left ventricular ejection fraction; SF, Shortening fraction; LVDD, Left ventricular diastolic diameter.
rSrO2, regional renal oxygen saturation; rScO2, regional cerebral oxygen saturation.
a
1 h postligation;
b
12 h postligation.