Table 1 Summary of multiparametric PDA scoring systems.

PDA Scoring Systems
McNamara-Sehgal⁸	El-Khuffash⁶	SZMC Score⁷	Iowa Score²	PLASE Score¹³
PDA diameter	Gestational age	PDA diameter	PDA diameter: weight	Gestational age
Max PDA velocity	PDA diameter	LA:Ao ratio	LA:Ao ratio	PDA diameter
PDA:LPA diameter	Max PDA velocity	Diastolic flow reversal in dAo	PV D wave	LPAedv
PAedv	LVO	Diastolic flow reversal in dAo	LVO:RVO	LA:Ao
LPAedv	LV a’ wave	PDA Doppler shunt pattern	Mitral E/A
LA:Ao ratio		PDA Doppler shunt pattern	IVRT
LV:Ao ratio			Diastolic flow reversal in dAo, Celiac, or MCA
LVO:SVC
Mitral E/A
IVRT
Score Validated Against
Chronic lung disease	Chronic lung disease/ death	Chronic lung disease/ death	Composite of individually validated markers	Need for PDA surgical ligation

PDA patent ductus arteriosus, SZMC Shaare Zedek Medical Center, PLASE PDA and Left Atrial Size Evaluation, LA left atrium, Ao aorta, LPA left pulmonary artery, dAo descending aorta, PV pulmonary vein, LPAedv left pulmonary artery end diastolic velocity, PAedv pulmonary artery end diastolic velocity, LVO left ventricular output, RVO right ventricular output, IVRT isovolumic relaxation time, LV left ventricle, MCA middle cerebral artery, SVC superior vena cava.

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