Measurements on short-axis magnetic resonance images were placed to correspond with measurements made on M-mode echocardiography and were used to calculate the left ventricular mass with the formula commonly used in echocardiography (LVMMRI/ASE). The end-diastolic inner left ventricular diameter (LVEDD) was measured from the middle of the inner aspect of the septal wall to the inner aspect of the posterior wall, and the interventricular septal thickness (IVS) and the posterior wall thickness (PW) were measured at the same level. To correspond with a parasternal short-axis M-mode view the image has to be turned 90 degrees clockwise.