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Background Left atrial volume (LAV) is an important prognostic predictor in cardiac disease. LAV is not routinely evaluated by cardiac magnetic resonance (CMR) as acquisition of a full volume dataset is time consuming, and previous authors have shown calculation of LAV using the biplane area-length method (BAL) from routinely acquired 4 and 2 chamber views (4CV, 2CV) significantly underestimates true volume. We hypothesized this underestimation was due to standard CMR 4CV and 2CV images (piloted from mid mitral valve to LV apex LV piloting) foreshortening the atrium, and that additional 4CV and 2CV images piloted from mid mitral valve to the mid posterior wall of the left atrium (LA piloting) would enable rapid, accurate calculation of LAV using BAL.

journal of cardiovascular magnetic resonance

Would adding two left atrial piloted images to a cardiac magnetic resonance protocol enable rapid, accurate calculation of left atrial volume? Use of 320 slice cardiac CT as proof of concept.