Fig. 3
From: Pearls and pitfalls in comprehensive critical care echocardiography
Upstream and downstream flow assessment in moderate or severe valvular lesions. a Systolic flow blunting in a pulmonary vein from severe mitral valve regurgitation (upstream). b Systolic flow reversal in the hepatic vein from severe tricuspid regurgitation (upstream). c Diastolic flow reversal in the descending aorta from severe aortic regurgitation (downstream)