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Vascular Ring Anomalies in Cats

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Persistent Right Aortic Arch in Cats

 

Vascular ring anomalies occur when a congenital abnormality of the heart's blood vessels result in the esophagus being compressed at the level of the base of the heart. This, in turn, prevents solid food from being able to pass properly past the compression as well as the dilatation of the esophagus in front of the compressed area. This is termed megaesophagus. Because food is not moved properly through the esophagus, regurgitation occurs.

 

Symptoms and Types

 

  • Regurgitation of undigested solid food in young cats (less than 6 months of age)
  • Malnourishment
  • Aspiration pneumonia resulting in coughing, increased heart rate and heavy breathing

 

Time between eating and regurgitation varies.

 

Causes

 

The cause for vascular ring anomalies in cats is a developmental congenital abnormality.

 

Diagnosis

 

A thorough physical examination and routine blood testing is usually performed. However, imaging is usually necessary for accurate diagnosis. Imaging may include thoracic radiographs (X-rays), contrast esophagography (usually performed with barium), fluoroscopy and/or angiography.

 

 
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