Figure 5From: Fetal circulation in left-sided congenital heart disease measured by cardiovascular magnetic resonance: a case–control studyRelationship between pulmonary vein velocity time integral ratio by Doppler and pulmonary blood flow by CMR. Fetuses with pulmonary lymphangectasia (PVO, Group 4) are compared with fetuses with normal lungs (no PVO, Groups 2 and 3). VTI-velocity time integral; PVO-pulmonary vein obstruction.Back to article page