Class 13 Flashcards
Increased Venus return will do what to preload?
Increase it
Approximately 70% of the ventricular filling is through what kind of filling?
Passive feeling
The ventricular EDV is a function of what three parameters?
1) ventricular filling pressure
2) Ventricular filling time
3) Ventricular compliance
When there is a higher pressure gradient, is there a higher or lower venous return?
Fire
Ventricular filling time and EDV are positively or negatively related?
Positively
With an increase in HR, diastolic period will increase or decrease more than that of systolic?
Decrease
Any increase in ventricular compliance will increase the overall what?
Ventricular volume or EDV
What kind of system is the cardiovascular system?
A closed system
Venous return is equal to what in the steady state?
Cardiac output
One flow is continuously increasing, write atrial pressure will drop to what kind of value, and why?
A negative value, due to outflow is so high (vacuum)
Mismatch between output and return in the RAP will create what?
A suction within the right atrium, negative value
When will the venous return ever be at zero?
In cardiac arrest, when there is no blood flow
Mean systemic filling pressure is a function of what two things?
1) fluid volume within the cardio system
2) Overall compliance of the entire system 
Lower the overall compliance, higher or lower the MSFP
Higher
An increase in CO and a decrease in RAP will lead to an increase or decrease in venous return?
Increase
What is the blood pressure in the thoracic vena cava in the proximity of the right atrium?
Central venous pressure or CVP
What does CVP effect?
Right ventricular filling and stroke volume
Any increase in the central Venus volume will increase or decrease the central venous pressure?
Increase
Any decrease in a central venous compliance will increase or decrease the CVP?
Increase
An increased blood volume or transfusion, generates a higher or lower CVP the normal?
Higher
A decreased blood volume or hemorrhage, generates a higher or lower CVP than normal?
Lower
Vasodilation or increase in blood flow will do what to CVP?
Generate a higher CVP
Vasoconstriction or decrease in blood flow will do what to CVP?
Lower CVP
Five factors that increase CVP through compliance or blood volume:
- decrease in cardiac output\heart failure
- Increase in fluid retention\renal failure
- Going from standing to laying
- arterial dilation
- muscle contraction
How can you increase myocardial contractility?
Increase sympathetic stimulation
Sympathetic stimulation causes a decrease in what?
Left and right atrial pressure
