P r
Left atrial diameter <0.001 0.720
Mitral valve area 0.002 0.475
Mean difference in the pressure 0.002 0.475
Pulmonary artery pressure 0.01 0.400
AF: Atrial Fibrilation, LV EF: Left ventricle ejection fraction, LA: Left Atrium, NICU: Neonatal Intensive Care Unit
Table 6: The echocardiographic parameters correlated with NYHA.