Description: In the transverse plane of the lower thorax the 4 chambers of the heart are seen.
Always start be identifying the right and left ventricles. The right ventricle is the one with large contact with the anterior chest wall while the left ventricle is only in contact with the anterior chest wall at its apex, also the right ventricle is smaller as it contains the moderator band. When you can identify the ventricles then the right and left atrium are consequently identified. The ventricular and atrial septa are also identified and the valve leaflets are seen.