3. Physiology
        3.2. Cardiovascular
            3.2.4. Regulatory mechanisms
3.2.4.3. Control of cardiac output

Control of cardiac output

 

Cardiac output dependent on

Note:

 

Cardiac function curve

Shows how changes in right atrial pressure affects cardiac output

 

Vascular function curve

Shows how changes in cardiac output affects right atrial pressure

Note:

 

Equilibrium

Interaction of cardiac function curve and vascular function curve shows
--> the equilibrium cardiac output at a particular level of right atrial pressure (or central venous pressure)

In normal person, at equilibrium,

 

Heart rate

In most cases (in normal persons)

When HR is between 100-200 [BL8:p217]

Changes in heart rate

--> Changes in preload, afterload, and contractility

--> Cardiac output is not changed significantly

Other notes

 

 

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