Cardiac Output

Question 1

What is Myocardial Performance

Answer 1

Ability of the heart to meet the demands of the body

Question 2

What is cardiac output

Answer 2

The amount of blood pumped by each ventricle in one MINUTE

Question 3

Formula for cardiac output

Answer 3

CO= HR (beats/min) * SV (ml/beat)

Question 4

The heart gets the least amount of blood (250ml/min). True or False

Answer 4

True

Question 5

Function of the Cardioaccelerator center

Answer 5

Activates sympathetic neurons that increases HR

Question 6

Cardioinhibitory Center

Answer 6

Activates parasympathetic neurons that decrease HR

Question 7

What does the Frank- Sterling Law state:

Answer 7

The force of contraction is related to the degree of stretch of the myocardial fibers

Question 8

Preload=

Answer 8

Volume of blood in ventricles at the End of diastolic volume;
Pee the pree (atrium peeing into the ventricle)

Question 9

Afterload=

Answer 9

End of systolic pressure; resistance left ventricle must overcome to circulate blood

Question 10

List some factors that affect heart rate

Answer 10

Exercise
Hormones
Autonomic innervation
Age

Question 11

List 5 factors that affect Stroke Volume

Answer 11

Exercise
Size of the heart
Age
Contractility
Gender
Preload
Afterload
Duration of contraction

Question 12

Define contractility

Answer 12

Any increase in the force of contraction that CANNOT be attributed to Frank-Sterling mechanism of the heart

Question 13

What is cardiac reserve

Answer 13

Difference between cardiac output at rest and the maximum volume of blood the heart is capable of pumping per minute

Question 14

What happens to the stroke volume and end systolic volume if heart rate and contractility is increases

Answer 14

Stroke volume increase
End systolic volume decrease

Question 15

What happens to the stroke volume and end systolic volume if heart rate is increased and is the only factor

Answer 15

Stroke volume would decrease
End systolic volume increase