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CFI

I have a questions. I often see CFI of the aortic outflow from the R parasternal 5 chamber view.

Isn’t the beam perpendicular to the flow? How can you get accurate information in this way. You would

not do PW spectral doppler here.

Maybe I just don’t get it. Please explain.

I have a questions. I often see CFI of the aortic outflow from the R parasternal 5 chamber view.

Isn’t the beam perpendicular to the flow? How can you get accurate information in this way. You would

not do PW spectral doppler here.

Maybe I just don’t get it. Please explain.

admin

6 responses to “CFI”

  1. Dr O’brien was kind enough to

    Dr O’brien was kind enough to explain this to me.

    I was under the false impression that the flow was laminar and therefore we should not pick up the color mapping. Blood flow is not laminar here and we will pick up turbulence even if we can’t adequately measure accurate velocities from this perspective. Such a simple concept- I can’t believe I did not see it. Maybe this question will enlighten someone else.

    Thank you Bob

  2. Dr O’brien was kind enough to

    Dr O’brien was kind enough to explain this to me.

    I was under the false impression that the flow was laminar and therefore we should not pick up the color mapping. Blood flow is not laminar here and we will pick up turbulence even if we can’t adequately measure accurate velocities from this perspective. Such a simple concept- I can’t believe I did not see it. Maybe this question will enlighten someone else.

    Thank you Bob

  3. Hi!
    If there is turbulence

    Hi!

    If there is turbulence within the LVOT or aortic root you will see it as turbulence, also from the right parasternal 5 chamber view. The reason is that turbulence will cause erythrocytes to flow in various directions at varying velocities. The advantage of the right side is that the region of interest is closer to the transducer.

    You are completely right that velocities along the LVOT and AO should not be measured from the right side because of mis-aslignment with the Doppler beam.

     

    Peter

  4. Hi!
    If there is turbulence

    Hi!

    If there is turbulence within the LVOT or aortic root you will see it as turbulence, also from the right parasternal 5 chamber view. The reason is that turbulence will cause erythrocytes to flow in various directions at varying velocities. The advantage of the right side is that the region of interest is closer to the transducer.

    You are completely right that velocities along the LVOT and AO should not be measured from the right side because of mis-aslignment with the Doppler beam.

     

    Peter

  5. Thank you Peter
    The fault

    Thank you Peter

    The fault with my original thinking was that the flow was laminar and how could the CFI be accurate and useful. I fully understand now.

  6. Thank you Peter
    The fault

    Thank you Peter

    The fault with my original thinking was that the flow was laminar and how could the CFI be accurate and useful. I fully understand now.

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