Cardiac output Flashcards
1
Q
Formula for cardiac output?
A
Stroke volume x heart rate
CO = SV x HR
2
Q
What is cardiac output?
A
The amount of blood ejected by the heart in one minute
3
Q
What is cardiac output measured in?
A
Litres
4
Q
What determines cardiac output?
A
Heart rate and stroke volume
5
Q
What is stroke volume measured?
A
Ventricular volume is measure by the filling pressure and ventricular compliance
6
Q
What is stroke volume?
A
The volume of blood ejected during systole
7
Q
What is a typical cardiac output?
A
5l/min
8
Q
What determines filling pressure of the ventricles?
A
Atrial pressure
9
Q
Average stroke volume when at rest?
A
70ml
10
Q
What effect does exercise have on cardiac output?
A
Cardiac output can increase from around 5l to anywhere between 25-35l
This is called cardiac reserve
