cardiac muscle mechanics Flashcards
1
Q
co=
A
HR*SV
2
Q
SV=
A
EDV-ESV
3
Q
ESV
A
amount remaining in heart after systole
4
Q
EDV
A
amount filled
5
Q
what affects EDV
A
preload
6
Q
what affects ESV
A
after load and inotropy
7
Q
preload
A
initial stretch prior to contraction, ventricular wall, max stretch = EDV/EDP
8
Q
starling law
A
more enters, more ejected (heterometric… related to sarcomere length)
9
Q
what regulation is related to sarcomere length
A
heterometric
10
Q
starling Mech.
A
myofilament overlap, length dep. activation
11
Q
compliance is related to
A
preload, less at higher volume…
12
Q
after load
A
mainly aortic pressure, load against heart ejection
13
Q
what increases afterload
A
pressure and hypertrophy
14
Q
isotropy is dependent or intependent?
A
independent!!
15
Q
what slope is inotropy related to
A
ESVPR
