RESEARCH COMMUNICATIONS OF THE 28th ECVIM-CA CONGRESS

This single centre, prospective, cross‐sectional study was approved by the local Veterinary Ethical Review Committee. Dogs of various breeds undergoing anaesthetised thoracic MCTA for various diagnostic purposes were enrolled from a previous study on left atrial volume. Eligible dogs underwent a physical examination including blood pressure measurement prior to anaesthesia and cardiac auscultation to ensure that no heart murmur was present. Echocardiography was performed immediately following ECG‐gated MCTA. Measurements of LA:Ao were obtained at end‐diastole and end‐systole, identified as the frame at the onset of the QRS complex and the frame immediately after aortic valve closure respectively. Agreement between LA:Aous and LA:AoMCTA was evaluated using Bland‐Altman analysis and Pearson correlation. Coefficients of variation (CVs) were calculated to quantify intra‐ and inter‐observer variability.