Table 2.

Comparison of the cardiac parameters assessed in the different proposed staging systems.

	Quintero et al. 1999 [8]	Rychik et al. 2007 [21]	Shah et al. 2008 [48]	Habli et al. 2008 [19]	Stirnemann et al. 2010 [23]
		“CHOP-score”	“Cardiovascular profile score”	“Cincinatti staging”
Cardiothoracic ratio		x	x
Ventricular wall thickness		x		x
Shortening fraction		x	x
Tei-index right ventricle				x	x
Tei-index left ventricle				x	x
AV regurgitation		x	x	x
AV inflow		x
Pulmonary insufficiency		x
Outflow tract size		x
Ductus venosus	x	x	x	x
Umbilical vein	x	x	x	x
Hydrops	x		x	x
Umbilical artery donor	x	x	x	x

AV: ventricular valve.