Which vessels are typically evaluated in the three-vessel view during fetal echocardiography?

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The three-vessel view is used to look at the arrangement of the great vessels in one transverse slice of the upper mediastinum. In this view you expect to see the main pulmonary artery, the ascending aorta, and the superior vena cava aligned together. This trio is the hallmark of the three-vessel view and helps verify that the major outflow tracts are in the correct position and not markedly discordant in size, which could indicate conotruncal or outflow tract issues. The inferior vena cava, pulmonary veins, or coronary vessels aren’t part of this specific cross-sectional trio, so they don’t form the standard three-vessel view.