Table 1 Components of the Iowa PDA score and El-Khuffash PDA severity score both used to determine hemodynamic significance.
From: Stealing nephrons—a review on how patent ductus arteriosus physiology impacts neonatal kidney health
Iowa PDA Score | El-Khuffash PDA Severity Score |
|---|---|
Pulmonary vein D wave (cm/s) | Gestation (weeks) |
Mitral valve E wave (cm/s) | PDA diameter (mm) |
Isovolumetric relaxation time (ms) | Left ventricular output (mL/kg/min) |
Left atrium to aortic root ratio | Maximum PDA velocity (m/s) |
Left to right ventricular output ratio | Left ventricle a’ wave (cm/s) |
Aortic/Peripheral Doppler flow reversal | |
Ductus diameter indexed to weight (mm/kg) |
