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Figure 1: Fetal echocardiography imaging of supracardiac TAPVC to the SVC with obstruction. This sequence of images depict the fetal echocardiographic diagnosis of obstructed type of supracardiac type of TAPVC in a 23 week fetus. (a) The 4-chamber view with dilatation of RA and RV. (b) A relatively smooth wall of the LA with absence of the pulmonary vein connections. (c) The presence of an abnormal channel (arrow) in the area behind the LA. (d) The drainage of the individual pulmonary veins (arrows) into this channel. (e) A 3-vessel view with color Doppler showing the common channel draining into the SVC (s) with flow aliasing suggesting turbulence and obstruction. (f) Pulse wave Doppler of the vertical vein drainage site into SVC showing continuous flow suggestive of obstruction. RA: Right atrium, RV: Right ventricle, LA: Left atrium, LV: Left ventricle, LAA: Left atrial appendage, DA: Descending aorta, PA: Pulmonary artery, Ao: Aorta, SVC: Superior vena cava, TAPVC: Total anomalous pulmonary venous connection

Figure 1: Fetal echocardiography imaging of supracardiac TAPVC to the SVC with obstruction. This sequence of images depict the fetal echocardiographic diagnosis of obstructed type of supracardiac type of TAPVC in a 23 week fetus. (a) The 4-chamber view with dilatation of RA and RV. (b) A relatively smooth wall of the LA with absence of the pulmonary vein connections. (c) The presence of an abnormal channel (arrow) in the area behind the LA. (d) The drainage of the individual pulmonary veins (arrows) into this channel. (e) A 3-vessel view with color Doppler showing the common channel draining into the SVC (s) with flow aliasing suggesting turbulence and obstruction. (f) Pulse wave Doppler of the vertical vein drainage site into SVC showing continuous flow suggestive of obstruction. RA: Right atrium, RV: Right ventricle, LA: Left atrium, LV: Left ventricle, LAA: Left atrial appendage, DA: Descending aorta, PA: Pulmonary artery, Ao: Aorta, SVC: Superior vena cava, TAPVC: Total anomalous pulmonary venous connection