Sagmeister F, et al. – In this current study, the orthogonal phase contrast (PC) magnetic resonance imaging (MRI) with dynamic assessment of left ventricular outflow tract (LVOT) was compared to standard longitudinal cine MRI and 2D echocardiography. In investigations, calculated LVOT areas appeared to be sufficient for daily routine. Compared to the orthogonal view, standard long-axis three chamber view (3CV) underestimates the LVOT size and overestimates the systolic reduction of LVOT-size. In late systole, systolic changes were most pronounced.