Extent of size, shape and systolic variability of the left ventricular outflow tract in aortic stenosis determined by phase-contrast MRI

Calculated LVOT areas seem to be sufficient for daily routine. Compared to the orthogonal view, standard long-axis 3CV underestimates the LVOT size and overestimates the systolic reduction of LVOT-size. Systolic changes are most pronounced in late systole.