RESEARCH COMMUNICATIONS OF THE 28th ECVIM-CA CONGRESS

Left atrial size (LAS) aids clinical decision‐making in left‐sided heart disease. Left atrial to‐aortic‐root ratio on short axis view is commonly used to assess LAS. This unidirectional measurement might not represent changes in other dimensions. Therefore, measurement of LA volume (LAV) is recommended for evaluation of LAS. Two‐dimensional methods such as biplane area length method (ALM) and biplane method of disks (MOD) can estimate LAV, assuming the LA to be a fixed shape. Alternatively, real‐time three‐dimensional echocardiography (RT‐3DE) measures LAV without geometric assumptions. In veterinary medicine none of these have been compared with volumetric gold standard like multi‐detector computed tomography angiography (MCTA), which correlates well with cardiac magnetic resonance imaging.