Timedora
Free Practice Quiz Question List

3 Cardiac Output and Cardiac Index Online Quiz Questions

Use this free practice quiz with 20 questions to review 3 Cardiac Output and Cardiac Index, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

Which statement correctly distinguishes stroke volume from cardiac output?

  1. A

    Stroke volume is blood pumped each minute; cardiac output is blood ejected with each heartbeat.

  2. B

    Stroke volume is blood ejected with each heartbeat; cardiac output is blood pumped each minute.

  3. C

    Stroke volume and cardiac output both describe blood ejected with each heartbeat.

  4. D

    Stroke volume and cardiac output both describe blood pumped each minute.

02
True or false
1 point

In a stable circulation, right- and left-ventricular cardiac outputs are approximately equal.

  1. A

    True

  2. B

    False

03
Fill in the blank
1 point

Complete the relationship: CO=HR×\mathrm{CO} = \mathrm{HR} \times .

04
Written response
1 point

In SV=EDV−ESV\mathrm{SV} = \mathrm{EDV} - \mathrm{ESV}, what does ESV stand for?

05
True or false
1 point

Increasing preload always improves stroke volume, including when the heart is failing or congested.

  1. A

    True

  2. B

    False

06
Choose one
1 point

An adult's resting cardiac index is within the commonly cited range of approximately 2.52.5–4.04.0 L/min/m². What is the most appropriate interpretation?

  1. A

    A value in this range proves that tissue perfusion is adequate.

  2. B

    A value outside this range by itself establishes a diagnosis.

  3. C

    The range is a guide, and the value should be interpreted with the patient's condition and other findings.

  4. D

    The range applies to cardiac output measured in L/min, not to cardiac index.

07
Fill in the blank
1 point

In thermodilution, the monitor estimates flow from the recorded after cooler injectate is introduced.

08
Choose all
1 point

Which factors can affect an echocardiographic Doppler estimate of forward stroke volume through the LVOT? Select all that apply.

  1. A

    Error in measuring LVOT diameter

  2. B

    An inaccurate oxygen-consumption measurement

  3. C

    Rhythm irregularity

  4. D

    Poor image quality

  5. E

    The patient's body surface area alone

09
Written response
1 point

A patient has a cardiac output of 4.84.8 L/min and a body surface area of 1.61.6 m². Calculate the cardiac index.

10
Choose one
1 point

A patient with impaired ventricular function experiences increased afterload. What effect on stroke volume is most consistent with the described physiology?

  1. A

    It increases stroke volume in all patients by improving ventricular filling.

  2. B

    It can reduce stroke volume, particularly when ventricular function is impaired.

  3. C

    It changes cardiac index but cannot affect stroke volume.

  4. D

    It has no effect on forward ejection.

11
Choose all
1 point

When assessing whether a cardiac output or index reflects the patient's condition, which additional information should be considered? Select all that apply.

  1. A

    The trend in measurements over time

  2. B

    A single cardiac output value as a complete assessment of organ perfusion

  3. C

    Heart rate and rhythm

  4. D

    Clinical findings such as mental status and urine output

  5. E

    Blood pressure alone as proof of adequate perfusion

12
Choose one
1 point

Using the Fick method, estimate cardiac output when oxygen consumption is 250250 mL O₂/min and the arterial–mixed-venous oxygen-content difference is 5050 mL O₂/L blood.

  1. A

    0.20.2 L/min

  2. B

    2.02.0 L/min

  3. C

    5.05.0 L/min

  4. D

    12.512.5 L/min

13
Choose one
1 point

Doppler measurements give an LVOT cross-sectional area of 33 cm² and a velocity-time integral of 2020 cm. What stroke volume do these measurements estimate?

  1. A

    2323 mL

  2. B

    6060 mL

  3. C

    100100 mL

  4. D

    600600 mL

14
Open ended
1 point

A patient's heart rate rises substantially, but stroke volume falls because the faster rate reduces ventricular filling time. Explain why cardiac output might not rise.

15
True or false
1 point

The commonly cited adult resting cardiac index range of approximately 2.5–4.0 L/min/m² is a guide, not a stand-alone diagnostic cutoff.

  1. A

    True

  2. B

    False

16
Written response
1 point

A ventricle has an end-diastolic volume of 122 mL and an end-systolic volume of 54 mL. What is its stroke volume?

17
Written response
1 point

In the Fick method, which oxygen measure is used to find the arterial-to-mixed-venous difference, rather than using saturation alone?

18
Choose one
1 point

During thermodilution, which temperature–time pattern is associated with faster blood flow?

  1. A

    A longer, larger temperature change

  2. B

    A longer, smaller temperature change

  3. C

    A shorter, smaller temperature change

  4. D

    No temperature change at the downstream sensor

19
Choose one
1 point

When estimating stroke volume by Doppler echocardiography, why can an error in measuring LVOT diameter affect the result?

  1. A

    It changes the patient's heart rate used in the calculation.

  2. B

    It can distort the calculated LVOT area and therefore the stroke volume.

  3. C

    It changes the body's oxygen consumption.

  4. D

    It prevents the Doppler method from using a velocity-time integral.

20
Choose one
1 point

Which method calculates cardiac output using oxygen consumption and the difference between arterial and mixed-venous oxygen content?

  1. A

    Fick method

  2. B

    Thermodilution

  3. C

    Doppler echocardiography

  4. D

    Calculation from heart rate and stroke volume