Figure 2
Left ventricular outflow tract dimensions and cross-section area measurements by CMR. Left ventricular outflow tract (LVOT) cross-sectional (ALVOT; red solid line), anterior-posterior (AP) diameter (blue line), right-left (RL) diameter (blue line), and AP/RL diameter ratio for two different patients. The dashed red line represents the cross-sectional area of LVOT estimated on the basis of the AP diameter and assuming a circular LVOT shape. This estimation yielded values of LVOT cross-sectional area of 6.15 and 3.46 cm2 for these 2 patients compared to the actual area of 6.23 and 5.35 cm2, respectively.