LV systolic function Flashcards
1
Q
describe ventricular systole
A
- depolarization of the ventricles followed by mechanical contraction
2
Q
AO intracardiac pressure
A
systolic = 120 diastolic = 70 mean = 80
3
Q
mean RA pressure
A
4
4
Q
RV pressures
A
systolic 25
diastolic 4
5
Q
LV pressures
A
systolic 120
diastolic 10
6
Q
LA mean pressure
A
10
7
Q
PA pressures
A
systolic 25
diastolic 10
mean 16
8
Q
what shape is the pressure loop for the LV
A
rectangle
9
Q
what shape is the pressure loop for the RV
A
triangle
10
Q
preload
A
- muscles length or stretch @ end diastole
11
Q
afterload
A
tension that the LV must overcome before fiber shortening & contraction
12
Q
factors that increase stroke volume
A
- increased preload
- decreased afterload
- increased inotropy
13
Q
factors that decrease stroke volume
A
- decrease preload
- increase afterload
- decrease inotropy
14
Q
quantitative systolic measurement
A
- FS
- EF
- simpsons
- Area length method
- SV
Dt/dp - tissue doppler
- MPI
- global strain
15
Q
what length percentage must the A4c and A2c views be within?
A
<10%
