Table 1.
Echocardiographic and NIRS findings.
| Day of life | 40 | 51 | 58 (PDA Ligation) | ||
|---|---|---|---|---|---|
| PDA diameter (mm) | 3.4 | 3.2 | |||
| PDA maximum gradient (mmHg) | 33 | ||||
| LA/Ao | 2.5 | ||||
| E/A | 0.9 | ||||
| IVRT (ms) | 34 | Preligation | 9 ha | 20 hb | |
| LVCO (ml/kg/min) | 409 | 144 | 227 | ||
| LVEF (%) | 41 | 66 | |||
| Abdominal Aorta | Reverse end-diastolic flow | Reverse end-diastolic flow | |||
| rScO2 (%) | 79 | 42 | 60 | ||
| rSrO2 (%) | 25 | 37 | 56 | ||
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.
rSrO2, regional renal oxygen saturation; rScO2, regional cerebral oxygen saturation.
Preligation values.
a
9 h postligation;
b
20 h postligation.