The Right Ventricle Flashcards
RV 2D Views:
- RVOT
- Subpulmonic
- Short Axis at Base
- Apical 4 chamber
- RA / RV
- Subcostal
- Modified 4 Chamber
- Long axis at end diastole
The RV evaluation includes:
- Area of RV compared to the LV
- Shape of RV
- RV wall thickness
- Wall motion
- Wall function
Evaluating RV size compared to the LV
Normal: Less than LV size & Rv apex is shorter than LV Apex
Mild RVE: still less than LV
Moderate RVE: Same size at LV
Severe RVE: RV larger than LV
RV wall thickness should be no greater than ______ .
5 mm
What happens to the LV with severe RVE?
- LV decreases in size
- LV becomes hyper dynamic
- cannot maintain proper stoke volume
How do you evaluate TAPSE?
- put cursor through TV annulus
2. measure the excursion of leaflets from diastole to systole
TAPSE ranges:
2 cm = RVEF 50%
1.5 cm = RVEF 40%
1 cm = RVEF 30%
0.5 cm = RVEF 20%
Evaluating RV systolic function includes:
- TAPSE
- RV volumes
- RV dimensions
- Fractional Area Change
- Simpsons Rule
Why is the inter ventricular septum important?
- it is interdependent
- used by the LV and RV
- can be affected by changes in either chamber
- RV isn’t as big as the LV so the septum is a big part of the RV
What is Paradoxical Septal Motion?
Septum is moving in the opposite direction from the ventricle wall in systole
In reference to RV fractional Area Change, anything over _____ % is normal.
30%
32% - 60% is Normal Range
What is the formula for RV Fractional Area Change?
(RVED^3 - RVES^3)
——————— x 100
(RVED^3)
The formula for Mean Pulmonary Artery Pressure:
MPAP = [ 80 - (.5 x RVOT accel. time) ]
The formula for Pulmonary Artery End Diastolic Pressure:
PAEDP = [ (est. RAP) + ( end PI velocity) ^2 x 4 ]
The formula for RV / PA Systolic Pressure:
RV/PA SP = [ (est. RAP) + (peak TR velocity)^2 x 4 ]
