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. 2020 Sep 25;7(2):e001243. doi: 10.1136/openhrt-2020-001243

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Measurements for the volume calculations. Top left: wall length (WL) measurements taken as a straight line from the epicardial apex to the mitral annulus, shown for the septal and lateral WL measurements in the four-chamber view. Top right, the reconstructed M-modes from the same mitral annular points, showing the apical motion (MAPSE) equal to the left ventricular shortening. In the study, the mean of four walls from four-chamber to two-chamber views were used. MAPSE: mean mitral annular plane systolic excursion; IVSd: diastolic septum thickness; IVSs: systolic septum thickness; LVPWd: diastolic posterior wall; LVPWs: systolic posterior wall; LVIDd: internal diastolic (cavity) diameter; LVIDs: internal systolic (cavity) diameter.