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文章來源: 於 2005-04-20 15:59:09
Blood Flow Across Stenotic Sites: Tricuspid Stenosis

You can see a tricuspid stenosis (TS) flow jet from the parasternal RV inflow, the apical, and the subcostal views. A TS flow jet appears in diastole, as blood moves through the tricuspid valve into the RV. TS flow jets exhibit the same characteristics as do mild to moderate MS flow jets. TS occurs less frequently than MS.

 

Blood Flow Across Stenotic Sites: Pulmonic Stenosis

To visualize the pulmonic stenosis (PI) jet utilize the parasternal RV outflow view, parasternal short-axis and subcostal view. The PS flow jet occurs in systole, as blood moves through the pulmonic valve into the pulmonary artery.


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This off-axis parasternal short axis view of a newborn infant shows a pulmonic stenosis flow jet in the pulmonary artery in systole using an enhanced velocity map. The blue color indicates the PS flow jet moving away from the transducer. Yellow hues indicate aliased flow while the turbulent flow has a characteristic mosaic of blue and yellow. The red color distal to the valve is the result of blood swirling in the pulmonary artery. The blue in the center of the picture represents normal blood flow in the aorta.