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5 month old Labrador Retriever

January 5, 2017 By Allison Zwingenberger

Today’s case is a 5-month-old Labrador Retriever who presents for evaluation of a heart murmur. Take a look and post your comments!

VD Thorax
R LAT Thorax
L LAT Thorax
Show findings...

Findings

The aortic arch is prominent on the lateral projection and less visible on the d/v projection. There is no apparent chamber enlargement. The pulmonary vasculature appears normal.

Show differential diagnosis…

Differential Diagnosis

Severe subvalvular aortic stenosis

Show diagnosis…

Diagnosis

On echocardiogram, there was severe subaortic stenosis with increased velocity of flow across the valve and mild aortic insufficiency.

Long term prognosis for this condition is poor. There is no cure for this disorder, and 70% of dogs die suddenly by 3 years of age due to left ventricular hypertrophy and secondary ventricular tachyarrhythmias. Studies have shown that atenolol can sometimes prolong overall survival by about 2 years.

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Filed Under: Canine, Case of the Day, Radiographs, Thorax

Comments

  1. Pablo Barge says

    January 5, 2017 at 4:15 am

    Hello, I believe that’s a DV view instead of a VD, would that explain why is the aortic arch less vissible on this view? Thank you.

    • Allison Zwingenberger says

      January 5, 2017 at 1:44 pm

      Yes it is a dorsoventral projection, thank you. It may explain why the aortic arch is less visible on that view. It is also quite midline so is under the spine in the position of the mediastinum.

  2. LipiSK0 says

    January 5, 2017 at 8:43 am

    http://vet.cornell.edu/hospital/Services/Companion/Cardiology/conditions/subaortic-stenosis.cfm

    Several surgical procedures and minimally invasive (balloon catheterization) procedures have been performed to reduce the obstruction of subaortic stenosis with variable success. However, recently a new technique has become available utilizing a special “cutting” balloon, which appears to have favorable results.

  3. Allison Zwingenberger says

    January 5, 2017 at 1:45 pm

    Interesting, thanks for the information!

  4. Sirius245 says

    January 10, 2017 at 2:27 am

    Thanks for sharing ˜~I have this question. Is there a bulge around LA area in left lateral recumbency? Thanks!

  5. Allison Zwingenberger says

    January 10, 2017 at 11:38 am

    Yes, I agree there is some left atrial enlargement on the left lateral projection.

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