C9: PSAX Colour And Spectral Flashcards
What’s the order of optimization of images?
2D, colour Doppler, spectral Doppler (CW and PW)
What should your sweep speed be? What about for tachycardia and bradycardia?
3-5 beats… you would increase sweep speed for tachycardia and decrease for brady
What’s the term that refers to a congenital bicuspid AV?
Raphe
Is physiological regurgitate considered normal?
Yes
When looking at endocardial motion what are the 2 things we are assessing?
Wall motion and thickness
When happens to the valves when the chambers of the heart start to enlarge?
They start to get stretched out and no longer close properly…. leads to regurgitation
Why do we sweep the IVS and the IAS with colour? Where do we start and finish the sweep?
To check for septal defects
Sweep from base of the heart to apex
Why do we sweep all the way to the apex?
To assess for a muscular ventricular septal defect
In which view do we do both PW and CW? Why do we do these?
PSAX RVOT
PW: to calculate stroke volume and assess the RV outflow velocity because many congenital abnormalities result in increase velocity in this area
CW: to assess for PV stenosis or stenosis of the PA… also PV regurgitation
Where will pulm regurgitation occur with CW? And Pulm outflow? In reference to baseline
Above the baseline…. pulm outflow will be below baseline
Where should the sample volume be placed when measuring acceleration time of the RVOT?
Placed in the RVOT
What is the Acceleration time refer to
Times it takes RVOT flow to reach peak velocity
Formula for mean pulm. Arterial pressure
MPAP=79-(0.45xPAT)
When doing PW on the RVOT how will the closing of the valves appear in the waveform?
vertical lines
how does mild pulmonary regarg appear?
a flame
