Review of Cardiovascular System Flashcards

1
Q

heart

A

muscular pump which moves blood to lungs and other tissue of body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

systemic circulation

A

supplies tissue of body w/ nutrients and oxygen-rich blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

types of circulations

A

systemic
pulmonary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

oxygenated blood in systemic circulation

A

returns FROM lung that is pumped FROM left ventricle THROUGH aorta and systemic arteries TO tissues where gas exchange occurs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

deoxygenated blood in systemic circulation

A

returns TO right atrium FROM superior vena cava

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

deoxygenated blood in pulmonary circulation

A

pumped BY right ventricle THROUGH pulmonary arteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what kind of blood is in capillaries of lungs?

A

blood is oxygenated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

oxygenated blood in pulmonary circulation

A

return TO left atrium THROUGH pulmonary veins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

cardiac perfusion

A

heart itself receives blood through coronary arteries which branches off aorta

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

when does heart receive blood

A

ONLY during relaxation d/t extreme pressure in heart during contraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what does changes in pressure in heart determine?

A

determines flow of blood in heart => opening and closing of valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

blood moves along a what kind of pressure?

A

pressure gradient - high to low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what does valve contribute to

A

unidirectional flow of blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

diastole

A

opening av valves
closing semilunar valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

opening av valves (diastole)

A

blood return to heart through atria - force AV valves open

atria contract, forcing additional blood into ventricles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

closing semilunar valves (diastole)

A

ventricular relaxation => ↓intraventicular pressure and blood flows back from arteries

16
Q

which sound does diastole do?

A

closing of semilunar valves - 2nd heart sound

17
Q

ventricular systole

A

closing av valves
opening semilunar valves

18
Q

closing av valves (systole)

A

papillary muscles contract to stabilize valves

ventricles contract, forcing blood against AV valves

19
Q

which sound does systole do?

A

av valves close - 1st heart sound

20
Q

opening semilunar valves (systole)

A

contraction of ventricles, force semilunar valves open

blood rushes into pulmonary arteries and aorta

21
Q

cardiac murmurs

A

abnormal sounds created by turbulemt blood flow in heart

22
Q

cardiac murmurs causes

A

pericardial rub, fluid overload and valve disease

23
Q

valve disorder occur most frequently where?

A

left side of heart

24
Q

valve disorders

A

mitral stenosis & regurgitation
aortic stenosis & regurgitation

25
Q

mitral stenosis

A

narrowing of valve b/w two left heart chambers

26
Q

mitral regurgitation

A

abrnomal leaking of blood backwards
FROM left ventricule, THROUGH mitral valves
- valve not closing properly

27
Q

aortic stenosis

A

aortic valve narrows and blood cannot flow normally

28
Q

aortic regurgitation

A

leaking of aortic valve of heart => blood flows in reverse direction during ventricular diastole
FROM aorta INTO left ventricle

29
Q

cardiac output

A

used to measure efficiency of heart to pump blood

30
Q

cardiac output formula

A

CO = HR x SV

31
Q

stroke volume

A

represent difference b/w amount of blood in ventricle after filling (EDV) and volume of blood remaining in a ventricle after contraction (ESV)

32
Q

factors affecting stroke volume

A

preload
contractility
afterload

33
Q

preload

A

filling of ventricles ie. venous return (affects EDV)
- too little or excessive preload => ↓CO

34
Q

what does ↑HR and filling time result to

A

↓EDV and preload

35
Q

frank-starling mechanism

A

↑venous return stretches muscle fibers to generate more contractile force

36
Q

contractility

A

contractile strength idependent of muscle stretch

37
Q

afterload

A

pressure the ventricles must overcome to force semilunar valves open and eject blood into arteries

38
Q

cardiac reserve

A

max % increase of CO above normal resting levels - depends on preload

ie. ventricular filling, afterload
ie. resistance to ejection of blood from heart, contractility and HR