Week 5 Ventricular Loading Flashcards
1
Q
What is the frank starling law
A
The greater the volume of blood in the heart during diastole, the more forceful the contraction
2
Q
What is stroke volume
A
- The volume of blood pumped out of the ventricles during systole
- NL value is 70-100 Ml/beat
3
Q
What is the equation for stroke volume
A
Edv-esv
4
Q
What are the 4 determinants of cardiac output
A
1) afterload
2) preload
3) contractility
4) heart rate
5
Q
What is the formula for cardiac output
A
Cardiac output = SV x HR
6
Q
What is ventricular preload
A
- The maximum the ventricle can expand at end diastole
- SV increases if preload increases
7
Q
What is arterial afterload
A
The load the heart must eject against during systole
8
Q
What is contractility
A
Force expended on the heart muscle causing a contraction
Greater contractility greater sv
9
Q
What is cardiac output and normal range
A
- Amount of blood ejected from the heart/min
- 4-8 L/min
