Early Role of the Atrial Level Communication in Premature Infants with Patent Ductus Arteriosus

. Author manuscript; available in PMC: 2022 Apr 1.

Published in final edited form as: J Am Soc Echocardiogr. 2020 Nov 20;34(4):423–432.e1. doi: 10.1016/j.echo.2020.11.008

Marker	0 points	1 point	2 points
Mitral valve E wave velocity (cm/s)	<45	45–80	>80
IVRT (ms)	>50	30–50	<30
PV D wave velocity (cm/s)	<30	30–50	>50
LA: Ao	<1.3	1.3–2.2	>2.2
LVO (ml/min/kg)	<250	250–430	>430
Diastolic flow in descending aorta AND/OR celiac/middle cerebral artery	Forward		Reversed

Total score = [# total points] + [PDA diameter ÷ weight at echo]

PDA: patent ductus arteriosus; IVRT: isovolumic relaxation time; PV: pulmonary vein; LA: Ao: ratio of left atrium to aorta; LVO: left ventricular output