PLAX- MMT And Doppler, Etc Flashcards
(30 cards)
What is the Bernoulli equation?
P1-P2=4V^2
What is the best order to take images?
- 2D
- Colour
- Spectral
Compare/contrast PW and CW
PW- samples from a specific area, used for lower velocities
CW- samples entire scan line, used for high velocities
Why don’t we use spectral on the MV valve in PLAX?
It isn’t a 0 degree angle. Colour is good for assessing MR
What is a normal CW peak velocity through the TV?
<2.7 m/s
How do you calculate RVSP?
RVSP= 4(peak TR)^2 + RAP
What is normal RVSP?
<35 mmHg
What measurement would the IVC be considered dilated?
> 21mm
What type of flow would be seen as red in the PLAX view on the RVOT side of the PV during diastole?
Pulmonary regurgitation
What would the RAP be for the following:
IVC exp = 24 mm
IVC sniff = 15mm
RAP = 15 mmHg
Calculate RVSP:
TR peak velocity = 2.6 m/s
IVC exp = 25 mm
IVC sniff = 9 mm
RVSP= 4(2.6)^2 + 8
=25mmHg
Which chamber is most anterior in PLAX?
RV
Which cusps of the AV are seen in PLAX?
Right and non-coronary cusps
What does the extra depth image assess?
Pericardial or pleural effusions
What PLAX measurements are taken at end-diastole?
IVS, LIVDd, LVPW, AO sinus, ST junction and ascending AO
What measurement is taken mid-systole?
LVOT diameter
What measurement is taken end-systole?
-LVIDs
-LA
What is normal IVS measurements for men and women?
Men <11mm
Women <10mm
What is normal LVIDd measurement for men and women?
Men <59mm
Women <53mm
What is another name for LV posterior wall?
Inferolateral wall
What is normal measurement for LV posterior wall for men and women?
Men <11mm
Women <10mm
What is average normal measurement for LVOT diameter?
18-22mm
What is calculated from LVIDd and LVIDs?
Teicholz linear EF
Fractional shortening
What is normal LA measurement for men and women?
Men <41mm
Women <39
