Cardiac Output, Stroke Volume, & Heart Rate

What is the definition of Stroke Volume?

• SV is the amount of blood that is pumped out of the heart per beat

• SV is the amount of blood that is pumped out of the heart when it tells you it is tired

• SV is the number of times the heart beats per minute

• SV is the amount of blood that is pumped out of the heart per minute

What is the definition of Cardiac Output?

• CO is the amount of blood that is pumped out of the heart per beat

• CO is the amount of blood that is pumped out of the heart when it tells you it is tired

• CO is the number of times the heart beats per minute

• CO is the amount of blood that is pumped out of the heart per minute

What is the definition of Heart Rate?

• HR is the amount of blood that is pumped out of the heart per beat

• HR is the amount of blood that is pumped out of the heart when it tells you it is tired

• HR is the number of times the heart beats per minute

• HR is the amount of blood that is pumped out of the heart per minute

How do you calculate Cardiac Output?

• CO = HR / SV

• CO = HR - SV

• CO = HR + SV

• CO = HR x SV

Tags

NGSS.HS-LS2-4

Calculate the Cardiac output

SV= 70 ml/beat

HR = 75 beats/min

• 5 L/min

• 5.25 L/min

• 5.5 L/min

• 5.35 L/min

Tags

NGSS.HS-LS2-4

If heart rate is 180 beats/min (which is very fast) and stroke volume is 70 mL/beat, then the cardiac output would be:

• 12 L/min

• 12.6 L/min

• 13L/min

• 13.6 L/min

Tags

NGSS.HS-LS2-4

Calculate the CO with the following:

HR = 120 bpm

SV = 140 mL/beats

• 18.8 L/min

• 28 L/min

• 16.8 L/min

• 12.8 L/min

Calculate the HR with the following:

CO = 5400 mL/min (5.4 L/min)

SV = 90 mL/beat

• 4.86 bpm

• 48.6 bpm

• 600 bpm

• 60 bpm

The term ESV, or afterload, is defined as

• maximum volume of blood in the ventricles (during relaxation and loading)

• volume of blood in the atria during diastole

• minimum volume of blood in the ventricles (during contraction)

• pressure of left ventricle during diastole

The term EDV, or preload, is defined as

• maximum volume of blood in the ventricles (during relaxation and loading)

• volume of blood in the atria during diastole

• minimum volume of blood in the ventricles (during contraction)

• pressure of left ventricle during diastole