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Membranous ventricular septal aneurysm in dogs and cats
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This congenital problem was thought to be very rare, but it might be more common than previously thought. The author of this study diagnosed 20 cases by echocardiography - as an incidental finding sometimes combined with other defects.
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Membranous ventricular septal aneurysm was diagnosed by echocardiography in 17 dogs and three cats.
The aneurysm appeared as a thin membrane protruding into the right ventricle from the margins of a congenital ventricular septal defect (VSD).
The aneurysm was intact in nine dogs and two cats and perforated by a small VSD in eight dogs and one cat.
Other congenital heart defects were present in seven dogs.
In all animals, the aneurysm was an incidental finding observed during echocardiographic examination, and it did not appear to directly cause any cardiac dysfunction.
Source: William P. Thomas (2005): Echocardiographic Diagnosis of Congenital Membranous Ventricular Septal Aneurysm in the Dog and Cat. In: Journal of the American Animal Hospital Association 41:215-220 (2005)
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