16 year old Australian Cattle Dog

Findings

The cardiac silhouette is enlarged, with marked left atrial enlargement. The trachea is elevated parallel to the spine, and there is a straightening of the caudal cardiac margin. The pulmonary vasculature is normal in size. There is a fine interstitial pulmonary pattern throughout the lungs, most concentrated in the caudal lung lobes. No pleural effusion is evident. ECG pads are visible on the left and right body wall, causing round opacities superimposed over the heart on the lateral projections. In the portion of the abdomen included, the liver extends beyond the costal arch. The caudal vena cava is normal in size, and the peritoneal detail is normal.