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23 Cards in this Set

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What is the term used to express the force that blood exerts against the walls of blood vessels?
Blood pressure
How is blood pressure generated?
The pumping action of the heart.
In what units is blood pressure expressed?
mmHg
Does blood flow at the same rate in the exact center of a vessel compared to at the sides of the vessel?
No
What is laminar flow and what causes it?
fast flow of blood in the center of a blood vessel. The friction (resistance) btwn the blood and the vessel walls.
a pressure wave which travels from the heart thoughout the arteries.
pulse
What is systolic pressure and what causes it?
Maximum pressure exerted by the blood against the artery walls. Results from systole (contraction)
Period of cardiac cycle when ventricles are contracting.
ventricular systole
What is a typical normal value for systolic pressure
120mmHg
What does the dicrotic notch represent?
The interuption of smooth flow to the brief backflow of blood that closes the aortic semilunar valve when ventricles relax.
What is diastolic pressure and what causes it?
Lowest pressure in the artery, and results from ventricular diastole(relaxation).
Period of cardiac cycle when the ventricule is relaxed.
ventricular diastole
What is a typical normal value for diastolic pressure?
80mmHg
pulse pressure
Difference btwn systolic pressure & diastolic pressure.
If the systolic pressure is 120 mm Hg and the diastolic pressure is 80 mm Hg, what would the pulse pressure be?
40mmHg
the throb you feel when you take your pulse
pulse pressure
interruption of smooth flow due to the brief backflow of blood
dicrotic notch
result of ventricular diastole
diastolic pressure
the force that propels the blood through the arteries
Mean Arterial Pressure (MAP)
the result of ventricular systole
Systolic pressure
Why is mean arterial pressure closer to diastolic pressure than systolic pressure?
Because the heart stays longer in diastole
Calculate the mean arterial pressure when systolic pressure is 120 mm Hg and the diastolic pressure is 80 mm Hg.
Diastolic pressure + 1/3 pulse pressure.
120mmhg
What do the sounds correspond to when a blood pressure is taken?
The sounds are the blood being let back through the artery after the cuff is removed. After artery flow returns to normal, no more sound is heard. The 1st sound corresponds with systolic pressure (contraction), and when sound stops it means that pressure has reached diastole (relaxation).