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(A) The right parasternal long-axis view of the left ventricular outflow tract in examined donkeys using B-mode guidance for M-mode echocardiography. (B) The right parasternal view of the long-axis left ventricular outflow tract in examined donkeys using M-mode echocardiography at zero time. IVS = interventricular septum; LVID = left ventricular internal diameter; LVPW = left ventricular posterior wall.
