Aortic and pulmonary arteries are too small
The tricuspid septum and / or posterior valve occasionally attach to the right ventricular wall near the apex with the anterior valve down, accounting for about 0.5% to 1.0% of congenital heart disease. Pulmonary blood is small and heart shadow is enlarged, aorta and pulmonary artery shadow are small, and heart shadow is like a balloon.
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