Figure 1

MRI catheterization images (a) Gadolinium-filled balloon-tip (arrow) catheter in superior vena cava. (b) Gadolinium-filled balloon-tip (arrow) catheter in left ventricle through atrial septal defect. (c) Anomalous pulmonary vein (arrow) draining into superior vena cava. (d) Lung perfusion map showing multiple filling defects (arrows).