Interpretation

Radiographic findings:

The cardiac silhouette is enlarged on the lateral view extending more than 2/3 the height of the thorax and occupying 4 ½ intercostal spaces. The trachea is elevated and runs nearly perpendicular to the spine. There is enlargement of the left atrium on the lateral view and bowing of the mainstem bronchi on the VD/DV view also indicating left atrial enlargement. The left ventricle also appears to be enlarged. On the VD/DV view, there is a focal dilation of the proximal descending aorta. There is also a dilation of the main pulmonary outflow. There is a prominent vascular pattern in the caudal dorsal lung fields and pulmonary veins appear larger than pulmonary arteries.