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Fig. 2. Method of measuring left ventricular diastolic (a) and systolic (b) areas (dotted lines). Left ventricular chamber diameter in diastole and systole (LVIDD, LVIDS) were calculated from cavity areas as: Left ventricular internal diameter=2
(left ventricular internal area/
). Myocardial thickness in diastole and systole (MTD, MTS) were calculated from left ventricular internal and external areas as: Myocardial thickness=
(left ventricular external area/
)-left ventricular internal diameter/2. RV=right ventricle; IVS=interventricular septum.