of the body and the inferior vena cava coming from the lower half of the body. Next blood will be in the right atrium and will flow uninterrupted through the tricuspid valve through to the right ventricle. The blood from the right ventricle should go to the pulmonary artery via the pulmonary valve. The blood from the pulmonary vein enters the left atrium, then flows through the mitral valve to the left ventricle. After the left ventricle is filled with blood the aortic valve opens allowing blood to go through, which the blood then enters the aorta and goes to the rest of the body. Diagnosis Crisscross heart can be diagnosed by an echocardiogram, angiocardiogram, and a cardiac MRI. To diagnose crisscross heart during embryonic development a sonogram will be used, and it is very important identify the disease prenatally so the child can be treated immediately for better cardiac function in adulthood. Treatment Without treatment crisscross heart can be fatal. The treatment is aimed to fix a deviated septum and pulmonary valve stenosis rather than the rotated heart itself. References Further reading External links Congenital heart defects