2017 ACVIM Forum Research Abstract Program

The 2D TTE and angiographic MDD measurement is acquired in the same orientation as 3D TEE measurement A. A was the smallest of the 2 perpendicular 3D measurements in 23/24 (96%) dogs. The ratio of A/B indicated a circular (0.05 mm difference between A and B) shaped ampulla in 5/24 (21%) and MDD in 7/ 24 (29%). Real-time 3D TEE documented a dynamic change in the pulmonary ostium dimensions throughout the cardiac cycle. In 21 dogs with angiography performed prior to catheter-based closure, morphology was classified as type IIA (16), type IIB (3), type III (1, subsequently ligated), and other (1, similar to Krichenko type D). All 7 dogs with circular MDD on 3D TEE were classified as type IIA on angiography. Median Amplatz Ã’ canine duct occluder (ACDO) size used in 20 dogs was 7 (range, 3-10). Median (range) CDO to MDD ratio was 2.04 (1.48-3.07) with angiography and 2.09 (1.25-4.00) with 2D TEE. Median (range) CDO proximal disc to ampulla ratio was 1.68 (1.26-2.78) with angiography and 1.76 (1.07-2.63) with 2D TEE. The measurement deemed most accurate including 3D TEE was used to make device selection in individual cases. No complications occurred in any dog.