Fig. 8From: Society for Cardiovascular Magnetic Resonance/European Society of Cardiovascular Imaging/American Society of Echocardiography/Society for Pediatric Radiology/North American Society for Cardiovascular Imaging Guidelines for the use of cardiovascular magnetic resonance in pediatric congenital and acquired heart diseaseColor coded through plane PC-MR of the main pulmonary artery (MPA) in systole (upper left, orange) and diastole (upper right, blue) demonstrating antegrade (orange) and retrograde flow (blue) signifying severe PR. Lower panel is a flow (Y-axis) time (X-axis) curve demonstrating PR and antegrade end diastolic flow (after 900 mseconds). Ao = aorta, LV = left ventricle, ml/s = milliliters/second, ms = millisecondsBack to article page