Table 1.

Comparison of the mitral valve flow velocity and vortex data between the left ventricle and right ventricle of 36 healthy second-trimester foetuses

Group	mitral valve flow velocity			vortex data
	E(cm/s)	A(cm/s)	E/A	vortex Area (mm2)	vortex Circulation(m2/s)
LV(n = 36)	37.17 ± 3.34	59.31 ± 5.09	0.63 ± 005	21.47 ± 7.17	4.11 ± 1.56
RV(n = 33)	38.06 ± 4.18	59.36 ± 4.36	0.64 ± 0.05	20.91 ± 8.76	4.21 ± 1.39
t	-0.97	-0.43	-0.98	-0.46	-0.26
p	0.33	0.97	0.33	0.65	0.8

Values are expressed as the mean ± SD. RV: right ventricle; LV: left ventricle