Table 1.
Visualization rates of fetal echocardiographic planes at various gestational ages
| Echocardiographic planes | 15-17 wk (N = 31) |
18-22 wk (N = 64) |
23-27 wk (N = 37) |
28-32 wk (N = 33) |
33-40 wk (N = 17) |
Total N = 182 |
p value | |
|---|---|---|---|---|---|---|---|---|
| Abdominal view | % | 96.8(30/31) | 100(64/64) | 97.3(36/37) | 97.0(32/33) | 100(17/17) | 98.2 | 1.000 |
| 4CH view | % | 96.8(30/31) | 98.4(63/64) | 100(37/37) | 100(33/33) | 100(17/17) | 99.0 | 0.606 |
| 5CH view | % | 87.1(27/31) | 100(64/64) | 100(37/37) | 100(33/33) | 100(17/17) | 97.4 | 0.002 |
| 3VV view | % | 83.9(26/31) | 98.4(63/64) | 100(37/37) | 100(33/33) | 100(17/17) | 96.5 | 0.003 |
| 3VT view | % | 45.2(14/31) | 64.1(41/64) | 81.1(30/37) | 69.7(23/33) | 82.4(14/17) | 68.4 | 0.016* |
| Transv Ao arch | % | 74.2(23/31) | 76.6(49/64) | 51.4(19/37) | 54.5(18/33) | 23.5(4/17) | 56.0 | <0.001* |
| Long ductal arch | % | 93.5(29/31) | 98.5(63/64) | 100(37/37) | 84.8(28/33) | 64.7(11/17) | 88.3 | <0.001 |
| Long Ao arch | % | 96.8(30/31) | 95.3(61/64) | 100(37/37) | 93.9(31/33) | 76.5(13/17) | 92.5 | 0.022 |
| Long caval view | % | 93.5(29/31) | 96.9(62/64) | 97.3(36/37) | 78.8(26/33) | 70.6(12/17) | 87.4 | 0.001 |
| LVOT | % | 87.1(27/31) | 98.4(63/64) | 100(37/37) | 100(33/33) | 100(17/17 | 97.1 | 0.014 |
| Short axis Great V | % | 83.9(26/31) | 95.3(61/64) | 100(37/37) | 97.0(32/33) | 82.4(14/17) | 92.3 | 0.016 |
| Mean of all views | % | 85.6 | 92.9 | 93.4 | 88.7 | 81.8 |
4CH = four-chamber, 5CH = five-chamber, 3VV = three-vessel, 3VT = three-vessel and trachea, Transv Ao arch=transverse aortic arch, Long ductal arch=long axis of ductal arch, Long Ao arch = long axis of aortic arch, Long caval = longitudinal caval, LVOT = left ventricular outflow tract and Short axis Great V = short axis view of the great vessels.
p value from Fisher's Exact Test and p value* from Pearson Chi-square