Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Cardiovascular System > 4. Control Of Cardiac Output > Flashcards

4. Control Of Cardiac Output Flashcards

1
Q

What is the average cardiac output?

A

5L/min

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

What is the average stroke volume?

A

70ml

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

What is the formula for cardiac output?

A

CO = SV x HR

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

What is the formula for stroke volume?

A

SV = EDV - ESV

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

Approx what percentage of the EDV is the stroke volume/is pumped out with each heart beat ?

A

67%

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

How can you increase stroke volume in relation to EDV and ESV ?

A
  • increase EDV

- Decrease ESV

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

If total peripheral resistance decreases what happens to arterial and venous pressure ?

A
  • arterial pressure decreases

- venous pressure increases

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

If total peripheral resistance increases what happens to arterial and venous pressure ?

A

Arterial pressure - increases

Venous pressure - decreases

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

If cardiac output decreases what happens to arterial and venous pressure ?

A

Arterial pressure - decrease

Venous pressure - increases

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

If cardiac output increases what happens to arterial and venous pressure ?

A

Arterial pressure - increases

Venous pressure - decreases

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

What is the typical end diastolic volume of the left ventricle ?

A

120ml

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

What is the typical end diastolic pressure of the left ventricle ?

A

Approx 10mmHg

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

What happens to the ventricle wall if they are less compliant?

What happens to the pressure in the ventricles if compliance is decreased?

A

More stiff = hypertrophy = difficult to Stretch

Pressure increases

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

What is the normal sarcomere length ?

A

1.9 micro meters

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

What is the optimum sarcomere length ?

A

2.2 micro meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is afterload ?

A

Pressure/aortic impedance the heart has to pump against

17
Q

What is aortic impedance roughly similar to?

A

Arterial pressure

18
Q

What happens to the total peripheral resistance during exercise/increased metabolism ?

A

TPR REDUCES

19
Q

What is the typical pressure of the left atrium ?

A

8-10 mmHg

20
Q

What are the typical pressures of left ventricle during systole and diastole ?

A

Systole - 120mmHg

Diastole - 10mmHg

21
Q

What is the typical pressure of the right atrium ?

A

0-4mmHg

22
Q

What is the typical pressure of the right ventricle during diastole and systole?

A

Diastole - 4mmHg

Systole - 25mmHg

23
Q

What is average weight of typical heart?

A

350g

24
Q

What is the typical duration of a cardiac action potential?

In secs?
In ms?

A

0.28 secs

280ms

25
Q

What is the duration of a single contraction of the heart?

A

280ms

26
Q

Which valve in the heart has 2 cusps?

A

Mitral

27
Q

What can cause a s3 sound?

A

Ventricular filling

28
Q

What do the papillary muscles do?

A

Prevent valves from inverting during systole

29
Q

Which organ removes damaged erythrocytes ?

A

Spleen

30
Q

Which type of anaemia can result from aortic valve stenosis ?

A

Microangiopathic haemolytic anaemia

31
Q

Which organism results in rheumatic fever?

A

Streptococcal

32
Q

In >99% of cases rheumatic fever will result in which murmur ?

A

Mitral valve stenosis

33
Q

What is dysphagia ?

A

Difficultly swallowing

34
Q

What is dystonia?

A

Sustained/repetitive muscle contractions resulting in twisting & repetitive movements/abnormal fixed postures

35
Q

What is polydipsia?

A

Excessive thirst

36
Q

How can mitral valve stenosis result is dysphagia ?

A

= left atrium dilation
= pressing on oesophagus
= dysphagia

Cardiovascular System (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions