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Yr1-S2-Cardio Systems > Pressure and flow in arteries and veins > Flashcards

Pressure and flow in arteries and veins Flashcards

1
Q

Pressure wave is effected by

A

stroke volume

velocity of ejection

elasticity of arteries

total peripheral resistance

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2
Q

arterial pressure increases with

A

age

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3
Q

large pressure drop through the arterioles

A

abbot 90 to 40mmHg

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4
Q

pulmonary circulation pressure is …… of systemic

A

1 fifth

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5
Q

height of the JVP can be used to measure

A

CVP

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6
Q

Venous pressure (and therefore venous return) is effects by

A

Gravity

skeletal muscle pump

respiratory pump

venomotor tone

systemic filling pressure

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7
Q

MAP equation

A

MAP = CO x TPR

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8
Q

Map too low leads to

A

fainting (syncope)

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9
Q

Map to high leads to

A

hypertension

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10
Q

Baroreceptors

A

sensors located in blood vessels

sense blood pressure and relay the information to the brain

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11
Q

regulating BP in the SHORT term is done by

A

baroreceptors

sends messaged to brain to constrict/dilate vessels

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12
Q

regulating BP in the long term revolves around the

A

blood volume

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13
Q

Regulating BP in the long term can be done by hormones such as

A

angiotensin II

aldosternone

vasopressin

Atrial natriuretic peptide

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14
Q

vasopressin

A

arteriolar constriction

therefore increased TPR

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15
Q

angiotensin II causes

A

arteriolar constriction

therefore increase TPR

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16
Q

Atrial natriuretic peptide causes

A

arteriolar dilation

therefore decreased TPR

17
Q

Effects of standing up

A

increased hydrostatic pressure

18
Q

The increase hydrostatic pressure of standing up leads to decreased

A

EDV

preload

SV

CO

MAP

19
Q

The reflex response causes

A

decreased vagal tone

increased sympathetic tone

20
Q

decreased vagal tone

A

increased HR

Increase CO

21
Q

increased sympathy tone

A

increase HR

increase CO

increase contractility , SV

22
Q

during the valsalva manoeuvre thoracic pressure is

A

transmitter through to the aorta

23
Q

increased thoracic pressure will decrease

A

VR

EDV

SV

CO

MAP

Yr1-S2-Cardio Systems (33 decks)

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