Because the diaphragm in the fetus is at a higher level within the chest, making the heart more horizontal than it is after birth, the four-chamber view of the heart lies closer to a transverse section of the fetal thorax just above the diaphragm (Fig. 7.1) [1]. This view is easily obtained from a transverse plane of the upper abdomen by tracing the inferior vena cava to the right atrium and then angling the transducer slightly cranially until the four chambers are visualized.
Fig. 7.1

Level of the four-chamber view on the fetal body (a) and on a heart (b) diagram. The diagram demonstrates how the plane of this view lies along the long axis of the heart and perpendicular to the inlet of the interventricular septum. In the classical four-chamber view, the tricuspid valve and the mitral valve can be seen but not the aortic valve and the pulmonary valve, which lie on superior planes. AoV aortic valve, MV valve, PV pulmonary valve, TV tricuspid valve


Mitral Valve Pulmonary Vein Left Atrium Tricuspid Valve Tricuspid Regurgitation 
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