PMC6286740_01
The right lower pulmonary venous obstruction occurred because of the compression of vertebra. PV: pulmonary vein.
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At the age of 3 years, although right lower PVO occurred because of the compression of the vertebra, she did not demonstrate symptoms of PVO (Figure 1).
Pulmonary wedge pressure and SVEDP waveform. The pulmonary wedge pressure before NO test in (a) and after NO test in (b). SpO2: oxygen saturation; PAWP: right pulmonary arterial wedge pressure; SVP: single ventricle pressure.
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To measure the pulmonary arterial wedge pressure and pulmonary arterial pressure accurately, the waveform was monitored carefully (Figures 2(a) and 2(b)).
Inferior vena caval angiography. The pulmonary artery is shown in (a), and there is no delay in excretion of the contrast agent in (b).
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Although angiography was performed after the inhalation of NO and oxygen, there was no evidence of left pulmonary venous obstruction or delay in the excretion of contrast media (Figures 3(a) and 3(b)).
There was no acceleration of blood flow, and stenosis was not indicated at the surgical anastomosis between the pulmonary venous confluence and the atrium in pulmonary vasodilator testing.
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Despite the inhalation of NO and oxygen, there was no acceleration of blood flow, and stenosis was not identified at the surgical anastomosis between the pulmonary venous confluence and the atrium (Figure 4).