Atrial Size and Function Flashcards
As LA diastolic function worsens, its size will increase or decrease?
Increase
What things can affect the size of the LA?
- Mitral valve disease
- LV systolic or diastolic function
- LV pressure overload
- Atrial arrhythmias
- Congenital HD
- Cardiac transplant
What are the two ways you can measure LA size using dimension?
M-mode LA measurement and 2D LA measurement in PLAX
What are the two ways you can measure LA size using volume?
Area-length method, Simpson’s biplane
Between dimension and volume, which is more accurate when measuring the LA size?
Volume
What is the normal LA dimension in a woman?
2.7-3.8 cm
What is the normal LA dimension in a man?
3.0-4.0 cm
The Method of Disks (MOD) while calculating LAV is most common method to use. If your lengths differ by >5 mm, what is happening?
You are foreshortening
What is the normal LA volume index?
16-34 ml/m2
What is the severe LA volume index?
≥48 ml/m2
What is the severe LA dimension in a male?
> 5.2 cm
What is the severe LA dimension in a female?
≥4.7 cm
What is considered mild value for LA volume index?
35-41 ml/m2
What is considered moderate value for LA volume index?
42-48 ml/m2
If you are foreshortening your image, what technique can be used to fix it?
Sliding low and lateral
What is the normal RA major axis value?
<5.3 cm
What is the normal RA minor axis value?
<4.4 cm
Where do you measure the major axis?
Center of the TV annulus to superior RA wall parallel to the IAS at end systole
Where do you measure the minor axis?
Mid RA free wall to the IAS, perpendicular to the long axis of the RA
What is the normal value of RA area?
<18 cm2
What is the normal RA index for a female?
≤27 ml/m2
What is the normal RA index for a male?
≤32 ml/m2
