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Figure 2. Axial contrast material–enhanced CT scan obtained through the inferior aspect of the heart shows a fingerlike structure (arrow) projecting into the right atrium (RA). Note the coronary sinus emptying into the right atrium (arrowheads). The IVC is also seen entering the atrium at this level. The patient was referred for echocardiography, which revealed a prominent eustachian valve remnant. LV = left ventricle, RV = right ventricle.
