cv system values Flashcards
1
Q
Stroke volume
A
The amount of blood pumped out of the left ventricle per beat (ml)
Average 70ml
2
Q
Heart rate
A
The amount of times the heart contracts per minute (BPM)
Average 72bpm
3
Q
Cardiac output
A
The volume of blood pumped out of one ventricle per minute.
Cardiac output = HR x SV
4
Q
Ejection fraction
A
% of blood ejected from the ventricle during ventricular systole
5
Q
What is Venous return?
A
The volume of blood returning to the heart
(Under steady state conditions, venous return must equal cardiac output when averaged over time
6
Q
Factors assisting venous return
A
Pressure gradient
Skeletal muscle pump
Pocket valves
Smooth muscle
Gravity
Respiratory pump
