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What are the parts of the CV system?
Heart
Blood
Blood vessels
These arteries have a lot of connective tissue
Elastic arteries
Those closest to the heart
like the
aorta
and
pulmonary arteries
Exchange of nutrients, wastes and gases happens here
Capillaries
These join to make veins
Venules
What is normal resting heart rate?
60-100 bpm
What is the effect of age on heart rate?
Resting
- none
Maximum
- decreases
What is End Diastolic Volume?
135 ml
What is End Systolic Volume?
65 ml
How do you calculate stroke volume?
EDV - ESV
70 ml
What is Diastolic Filling Volume?
70 ml
Blood which goes from atria to ventricle during
diastole
How do you calculate cardiac output?
SV x HR
5L / min
What factors affect stroke volume?
amount of blood in ventricle
force of contraction
aortic pressure
How do you calculate venous return?
DFV x HR
5L/ min
What is the function of the heart?
generate pressure to maintain circulation
overcome resistance
Why is the right ventricle weaker?
It has to overcome less resistance
Where does the lesser circulation go?
right ventrical to lungs to left atrium
The pulmonary and systemic circulations are arranged in this
Series
Within the greater circulation, capillary beds are arranged in this
Parallel
This is where blood meets most resistance
arterioles
What does systolic pressure mean?
Pressure of blood exerted on arteries while heart is in systole
What is blood pressure in lesser circulation?
25 / 10
What is the pressure gradient in systemic circulation?
93 mm Hg
MAP - pressure in right atrium
How does old age affect blood pressure?
blood pressure increases
cuz kidneys change
and arteries harden
How do you calculate Vascular Distensibility?
increase in
V
/ (increase in
P
x original
V
)
These vessels have high compliance
veins
These vessels have low compliance
arteries
What is the formula for
compliance
?
distensibility x volume
"It is the total quantity of blood that can be stored in a given portion of vasculature for each mmHg rise in pressure"
Author
Bobopudge
ID
64623
Card Set
CVR1
Description
Introduction to EDV, ESV, blood pressure, compliance,
Updated
2011-03-23T20:14:07Z
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