2017 ACVIM Forum Research Abstract Program

The results of this study confirm the hypothesis that interreader agreement for radiographic classification of LAE is strong, even across specialty disciplines and levels of experience. There was variable agreement between readers for application of distinct, subjective criteria of LAE and this study indicated that increased height of the caudodorsal heart margin, splaying of the mainstem bronchi, and enlargement of the left auricle were the most consistent criteria used by cardiologists, radiologists, and interns to identify LAE. Subjective radiographic LAE severity had only moderate agreement with echocardiographic LAE severity regardless of objective LA size measure, however LAV and subjective LAE showed stronger agreement than LA:Ao.