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How
to get an PR Severity PHT. |
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Step
1: Obtain a PWD or a CWD of the pulmonary valve.
The flow profile of the aortic valve, in pulmonic
regurgitation will show a diastolic flow profile that
decays over the diastolic time period. Utilizing
the caliper function, mark the Vmax and Vmin to calculate
the slope and pressure half time of the diastolic
flow profile. A steep slope and a short PHT
will be indicative of severe pulmonic regurgitation.
Note that mild or moderate pulmonic regurgitation
are NOT holodiastolic, whereas severe pulmonic regurgitation
IS holodiastolic. In aortic regurgitation, mild
and moderate regurgitation IS holodiastolic, whereas,
severe aortic regurgitation IS NOT holodiastolic.
The differences in the two valve disorders occurs
because of the pressure differential between the respective
ventricular cavities and the great vessels. |
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