Dynamic left ventricular outflow tract obstruction (DLVOTO) is a common
29 condition in cats and humans. In this case report, a dog is described with
30 DLVOTO secondary to severe intra-abdominal hemorrhage caused by a
31 hemangiosarcoma. The dog was a 9-year-old, 35.7-kg, spayed female German
32 Shepard dog that presented with a history of tachypnea and collapse. A Levine
33 II/VI systolic murmur was present at the heart base. Abdominal
34 ultrasonography revealed a splenic mass and a large amount of ascites.
35 Echocardiography showed a reduced left ventricular diameter and an
36 increased aortic velocity caused by systolic anterior motion (SAM) of the
37 mitral valve apparatus. The heart murmur and the SAM were resolved after
38 treatment including a splenectomy and a blood transfusion.