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History: A 18 month old female spayed Labrador retriever presented for a grade 4/6 heart murmur first noted at 8 weeks of age. The murmur became worse after a canoeing accident in which she almost drowns. The fractional shortening was 42% (normal range >25%). The e point septal separation was .10 cm (<.6 cm is normal). The ratio of the left atrium to the aorta was 1.46 (<1.3 is normal). Velocity measured was 4.2 m/s with a pressure of 74mmHg.
Instructions for ultrasound cases:
With videos, use the 'FULL SCREEN' button on the playbar and the 'SCALING BUTTON' in the upper right corner of the full screen view (if available) to toggle scaling as needed.
Synthesis: Aortic stenosis: velocity 4.2 m/s pressure 74mm Hg
Case management: monitor for signs left heart failure, arrhythmias, and infections prone to endocarditis
©2013 American College of Veterinary Radiology