Changes

===Diagnostic Imaging===

===Diagnostic Imaging===

====Radiography====

====Radiography====

Left lateral, right lateral and ventrodorsal views of the thorax are needed. The key radiographic signs associated with mitral valve dysplasia and resulting left sided congestive heart failure are cardiomegaly leading to possible dorsal displacement of trachea. There will possibly be none, some or all of the following radiographic signs - left atrial enlargement (DV view appears at 2-3 o'clock position), left ventricular enlargement, bronchial compression, pulmonary venous  

Early in the course of DMVD, thoracic radiographs will be normal. As the disease progresses, cardiomegaly will become apparent. There may be evidence of left atrial enlargement, with or without dorsal displacement of the trachea and narrowing of the mainstem bronchus. Pulmonary venous distension may be observed if there is increased pulmonary venous pressure. Interstitial pulmonary oedema may precede alveolar pulmonary oedema. Evidence of right sided congestive heart failure maybe present in severe cases, radiographic findings include distension of the caudal vena cava, hepatomegaly, ascites and pleural effusion.

congestion (enlarged pulmonary arteries and veins) and/or pulmonary oedema.  

 

Evidence of right sided congestive heart failure maybe present in severe cases e.g. distended caudal vena cava, hepatomegaly, ascites, pleural effusions.

====Echocardiography====

====Echocardiography====