Fig. 4

Axial static images of the first pass perfusion cine taken with administration intravenous gadolinium. Prior to injection of contrast material, a the right atrial appendage aneurysm can be visualized compressing the right ventricle. After administration of 25 mL gadolinium IV contrast agent (Multihance^®), there is sequential opacification of the right (b) and the left (c) cardiac chambers. Afterwards, there is slow, progressive contrast opacification of the stagnant blood pool in the right atrial appendage aneurysm until complete contrast opacification of the aneurysm (d–f). This indicates that the original area of hypoenhancement found on computed tomography was in fact due to slow flow, not a thrombus. A, RAA aneurysm; LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle