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CVR > CVR 39 > Flashcards

CVR 39 Flashcards

1
Q

Haemodynamics

A

study of forces in circulation of the blood

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2
Q

Highest pressure recorded are

A

systolic

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3
Q

lowest pressures are

A

diastolic

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4
Q

pulse pressure is

A

systolic - diastolic

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5
Q

mean pressure is

A

diastolic + 1/3 pulse pressure

Applies to arteries but not left or right ventricles

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6
Q

absolute pressure in veins is an order of magnitude ______ than in major arteries.

A

lower

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7
Q

CVP central venous pressure is ___ in health

A

low

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8
Q

Complex wave forms of venous pressure are

A

A C V X Y

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9
Q

Why does CVP rise in heart failure

A

back pressure thoruh the lungs from left ventricular failure

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10
Q

What is flow Q

A

volume movement per time

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11
Q

BP over

A

CO * TPR

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12
Q

Reynolds number

A

the number where laminar turns to turbulent over 2000

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13
Q

LA is usually a ____ pressure chamber. If LVEDP is high or MA is chronic then LA ______.

A

low

enlarges

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14
Q

What is the main determinant of viscosity

A

haemocrit 3 times h20.

decreased RBC deacreases viscosity and chronic hypoxia like lung disease or altitude increases heart work in viscosity

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15
Q

When blood flow slows what forms in teh bloow

A

rouleaux

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16
Q

A disease that causes high plasma concentrations and thus changes viscosity

A

waldenstroms, macroglobulinimia, multiple myeloma

17
Q

What is compliance

A

measure of distensibiliaty

18
Q

As we age arterial compliance ______ and systemic blood pressure _____

A

reduces

increases

19
Q

Where does all the blood live

A 
4% in left heart
16% aorta and arteries
4% caps
64% in veins
4% right heart

Pressure greatest to least

20
Q

V=_____

A

Q/A
Q = flow
A = total cross section area

21
Q

How do we increase CO

A

increase HR
reduce ESV
increase EDV

CVR (43 decks)

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